More Details

Some of the more detailed responses to my request for anachronisms are archived here. I've taken the liberty of slightly editing some texts in order to "glue together" responses from the same person, and to divide the responses between the details for anachronistic items and details for other anachronisms. Also, .sigs etc. have been removed.


Colin Watson:
It's very difficult to pin-down dates on things. For example, plate
armour. There is a documented case of folk experimenting with large
plates sewn into armour from 1185. But the coat-of-plates didn't really
catch hold until the late 13th century. (I wouldn't call it platemail
BTW, I've been admonished in the past for using that particular D&Dism)

Another example, gunpowder. An important text on making gunpowder, Liber
Igneum, probably found its way into Europe by the mid 13th century. It
wouldn't be totally unbelievable for Magi with mid-eastern contacts to have
this info in 1220. However the first use of gunpowder in European
warfare is around 1300. Siege cannons early 14thC. Handguns mid 14thC IIRC.

So, you see the problem. There's a big difference between the thing
being available, and it being in widespread use. Sometimes 50 to 100 years
difference. Perhaps another column on the table is called for.

Then you've got the problem of terminology. Longbows were around, they
just probably weren't as powerful as the famous 15thC versions. Magnets
were around in the form of lodestone. Two-handed swords? Well, it
depends what you call a two-handed sword. I've heard that Celts used a
two-handed sword from horseback! 

Here are dates for important developments in Barding, Helmets and Crossbows
(three topics which are easy-ish to pin down the development of).

                            RARE               COMMON
Horse Barding  [1]         late 12th          mid 13th
Plate Barding              early 14th

'Masked' Helm  [2]                            late 12th
Brimmed war-hat [3]                           late 12th
Great Helm [4]                                early 13th
Bascinet [5]                                   mid 13th
Visored Helm [6]                              early 14th

Hunting Crossbow            Roman (3rd?)
War Crossbow (S. Europe) [7] 10th?             late 11th
War Crossbow (N. Europe)                        13th C.
Composite Crossbow          mid 12th           late 12th
stirrup + spanning hook [8] mid 12th           late 12th
windlass [9]                early 13th ?         1297
steel crossbow               1314               15th C.
Cranequin [10]                                   1375

Notes:
1. Partial chain and quilted armour for horses. (Barding had been around
   before, but had fallen out of use before this period)
2. A "Norman" helmet with a very broad nose guard which covered the cheeks.
   (Similar things had been around before, this is another "re-invention")
3. A round metal cap protecting the top of the head, with a brim. Popular
   with common soldiery.
4. Growing use of crossbows and lances necessitated the adoption of this
   completely closed helm. Note, it has no moveable visor.
5. The bascinet is a close-fitting open-faced helm which covers the back
   and sides of the head as well as the top. May be worn beneath a Great
   Helm for added protection.
6. Basically a bascinet with a movable hinged visor to cover the face.
7. Crossbows had been around since roman times for hunting. These are
   approximate dates for adoption of the crossbow in warfare. Initially
   much more common in the south of Europe than the North.
8. The stirrup is a metal hoop on the end of the crossbow which the
   archer places his foot in. The spanning hook is a hook on the belt
   which is attached to the bowstring to draw it. Prior to this, the
   crossbow would be spanned (drawn) by standing upon the bow itself,
   and drawing the string by hand.
9. An ungainly winch device for spanning crossbows. Early references
   to these winched crossbows appear in the Albigensian Crusade. They
   may or may not have been man-portable. First illustration 1297.
10. A rack-and-pinion device for spanning very heavy crossbows quickly
    (in about 15 seconds IIRC).


Use of the crossbow in war occured in southern Europe long before northern
Europe, hence I suggest S. Europe as the location of First Introduction. Rare
in the 10th century, common by the 13th.

My reference to experimental plate dated 1185 is so much of a one-off
that I would exclude it from your list. (Your magus of Verditius might
develop plate armour, but will he find anybody to wear it in battle?)
Plate was Rare in the late 13th century and became more common in the 14th.

K. Warner (aka Saille O'Fiaich):
The first form of playing cards were likely some form of tarot. The
first documented appearance is in (French or Italian, can't remember
exactly) court sometime during the 14th C. The origin of these cards are
hotly debated. In mythical terms, I'd probally place them from Egypt, as
the gypsy peoples were believed to also be from Egypt as well and
there's a connection between the two (beleived).

Of course, dice would be much much earlier and more common as
playing/gambling devices.

Alan Flesch:
I humbly offer the following citation.  I cannot vouch for veracity;
I simply came across this. (I'm trying to learn to play Tarokk.)

>From Dummett, Michael _Twelve Tarot Games_ , Gerald Duckworth and Co. Ltd,
Gloucester Crescent, London, NW 1980 (ISBN 0 7156 1485 1 (cased) )

"A single documentary reference shows that Tarot cards wee known in the 
court of James I, being regarded there as of French origin and being used
for a kind of card game.  Probably they did not then spread to any wider
social circle.  [...] Their reintroduction into Britain had to wait
until the 1880's, when they were marketed for those interested in
fortune-telling and the occult; and that association has persisted
ever since.  In recent years, the Tarot pack as become very widely
known; and at least 9 out of 10 in the Anglo-Saxon world who
have heard of them, perhaps 99 out of 100, think of them solely
as a document of the occult or an instrument of divination. ...

"This belief is quite mistaken.  The Tarot pack was invented in northern
Italy in the fifteenth century, probably in the 1430's (the 
earliest known mention of it is dated 1442); but no one associated
it with the occult or with telling fortunes until the 1780's,
in France.  That association was first made by Antoine Court de
Gebelin, who propounded the preposterous theory that the
pack was invented by ancient Egyptian priests as a means of 
symbolizing thier religious lore, a theory he published in
1781.  Within two years a professional fortune-teller who called
himself Etteilla had fastened onto this theory, and began
to tell fortunes by means of a form of the Tarot pack, greatly
altered by himself, which he called 'the Book of Thoth.'  It was
another hundred years before these notions were taken up anywhere but 
in France. ...

"There is, however, not a grain of truth in these theories. Playing
cards themselves probably reached Europe from the Islamic world
in the late fourteenth century, indeed most likely from the Egypt
of the Mamluks.  But Tarot cards are a european invention, 
specifically an Italian one.; nothing like them is known from
outside Europe, nor from before the fifteenth century."

Ben Trafford:
> The first form of 
> playing cards were likely some form of tarot. The first 
> documented appearance is in (French or Italian, can't 
> remember exactly) court sometime during the 14th C. The 
> origin of these cards are hotly debated. In mythical 
> terms, I'd probally place them from Egypt, as the gypsy 
> peoples were believed to also be from Egypt as well and 
> there's a connection between the two (believed).

	Hmm. . .first of all, unless your Saga takes place 
after the mid 1300s, you're not going to find any gypsies 
in Europe. Secondly, the gypsies didn't take up tarot, 
documented, until the mid-1800s. They did palmistry. Also, 
the whole "gypsies are from Egypt" thing is a mostly a 
British viewpoint. The other Europeans usually assumed they 
were from the southeast of Europe, usually somewhere just 
over the horizon. The French thought they were from 
Germany, the Germans thought they were from Hungary, the 
Hungarians thought they were from Turkey or modern-day 
Khazakstan, when in fact, they were from northern India, as 
we now know. 

	The tarot definitely (as opposed to guesswork) 
originated in the French court in the late 1200s, and was 
used for both divination _and_ as playing cards, and was 
referred to as women's magic, since the wives of nobles 
would wait outside of the chambers while the men discussed 
business and played cards, as dice was a peasant's game 
(I'm at work, or I'd quote the reference to ya). This 
opinion of dice would hold true until early in our century.

	Mythically speaking, the cards were thought to have 
come from France; the Egypt thing is a 19th century belief. 
If you're going to use cards in the game, remember that 
they'd be the realm of the mid-nobility, and probably not 
found at the peasant level, which tended to use dirtier 
methods, like animal sacrifice, reading feces, bones, egg 
yolks and the like. 

	Also practiced, though documented only in the 1400s 
in France, was the planchette, the practice of using a cup 
to point to letters or (in early forms) images on a table.

	The source is from a local PhD student's thesis on
tarot and divination in general.

	It seems she found accounts to indicate that the 
tarot (or at least, carved wooden plates used as playing 
cards for divination) preceded the Italian versions by 
about 200 years. They weren't tarot as we'd recognize them, 
from the Waite standardization, but similar in function.

Joshua Landrum:
Knitting was introduced to Western Europe some time in the 13th century;
it probably came from Egypt.  Buttons were likewise introduced during
the 13th century.  As I recall, the spinning wheel and a better loom
were introduced around then, too -- dramatically reducing the cost of
clothing, of course (so 14th century clothing prices really shouldn't
be compared to 12th century prices).  I believe compasses were just
starting to be used around 1200, or maybe a little later (though they
are much older than that; they came from China).  For those of you with
campaigns set in earlier periods, the moldboard plow was introduced
early in the 9th century and gradually spread; the horse collar and
horseshoes were introduced late in the 9th century (or maybe the middle).
Before their introduction, you really couldn't use horses to plow; the
load would choke them.  Paper was just starting to appear around 1200
in Christian Europe; it arrived from China via the Middle East and
Spain.  Sometime around 1200 the sternpost rudder was introduced (again,
from China); your basic Viking longship had a steering oar on the side
(this may be apocryphal, but as I recall that's where "starboard" came
from -- the side with the steering board).  All in all, the 13th century
was pretty exciting.  The stirrup may have been introduced to Europe
(from the Asian steppes) as early as the 9th century; it, however,
spread fairly slowly and didn't reach England till 1066.
Note that all of this is from memory, so some of the dates are doubtless
off a bit.  Not all that much for most, though.
I hope.

Michael Schloss:
> How did people store books?

On tables, generally.  Remember that before printing was invented, a
couple of dozen books in one room was considered to be a fairly impressive
library.  No need to have bookshelves when you don't have enough books to
fill them :).

Romuald Perinelle:
+  Coffee          Yemen                IXth c., XIth cent. (Avicenne) 
                                                      XVIth cent.
+  Eye glasses     Italy                1285    (Rq : not everybody agrees)
+  Gunpowder       China                              end of middle age
+  Magnets         Old Greece or before               Middle Age
+  Playing cards   Asia                 around IXth C. XIIth C. 
+  Potatoes        America              very old      1526
+  Tea             Asia                 Legend says 2750 before JC 
(Chen-Nong), evedences exist for around 500 years BC (Confucius)
						      1559 (venise)
+  Tobacco         Unknown(1)                         1520
(1) : was used on the corpse or Ramses II.


>  Alchemy		
	Toth's priests, If i remember well
	Beginning in XIVth cent. in Paris, but older in meterranean 
countries. 
	Word exist from 1265 in France.
>  Dante's Hell        Europe
	The word Enfer (hell) in France : 1080.
>  Celibate clergy     Europe
+  Feminism            Europe               1837 in France (The word, not 
the ideal !)
Sapho, Greece, a long time ago
Lilith, long before. :^P
+  Papal infallibility Europe               1870 (Proclamation)
Others : 
Street lights :
In 1258 Etienne Boileau, "Prevot" of Paris, orders people to have a light 
in front of their house. Nobody listens. Philippe V, in 1318, adds light 
on the door of the Chatelet tribunal.

Ben Trafford:
> >  Item            First introduced in  When          Available in Europe
> >  ====            ===================  ====          ===================
> +  Coffee          Yemen                IXth c., XIth cent. (Avicenne) 
>                                                       XVIth cent. 

	Okay, maybe this is a little uptight of me, but coffee has been around 
for a heck of a lot longer than the 9th century. . .read some old (preIslam) 
Arabic texts and accounts of Arabic life. The coffee service was discussed as 
early as 2 B.C. (and that's without me doing any research but reaching over my 
shoulder to a bookshelf).

Ketil Z. Malde:
>  Compasses

The vikings apparently used a magnetic stone on a floating wooden disk
to keep track of direction.  This is according to rumour, but probably
mythic enough to be included in the game.  Also, they had some kind of
rock crystal, which made it possible to see the sun behind cloud cover
(something to do with polarization, wth. do I know, anyway.)

>  Eye glasses

Galileo used lenses to piece together a telescope in the 1600s, wasn't
it?  And he wasn't even the first, and I assume eyeglasses (or at least
magnifying glasses) were the primary use for lenses before that.

>  Longbows

Very old.  I'll dig up that old Scientific Americal article, but I think
they found bronze age longbow-like bows.   Very popular in periods,
depending on who you fought.   Late (1500s, Mary Rose, wasn't it?) they
made the bows thicker, with it's largest diameter outwards, instead of
flat.  Flat bows are better, but you get more bows per stave of wood, so
it's a matter of economy.

>  Two-hand swords Japan/Asia 1100?  14th century

I'm sure claymores etc were found in Europe by then or before.  No
guarantees. 

John Petherick:
Tobacco would have been introduced to Europe at, approximately, the same
time as potatoes.

Potatoes, tomatoes, tobacco, beans (except for broad or fava beans), corn
(maize for Europeans), squash and pumpkins were all first domesticated in
the Americas.  It's generally  believed to have been central America
(Mexico) for everything but potatoes (South America by the Incas or their
neighbours).

Similarly, turkeys also originated in the Americas.

When these products became common would be much later for most.  Potatoes
and tomatoes are nightshades (Solanaceae) and were believed to be poisonous
(parts of the plants are, in fact).

Pasta noodles are said to have originated in China and been introduced to
Italy by Marco Polo.

Spike Y. Jones:
Brandy (distilled wine) was invented in 1300 by alchemist Arnau de Villanova.
The process of distilling was known before his invention, but while it was
used for other purposes (such as making drinkable water out of salt water),
this is the first *recorded* use of it for the purpose of making liquor.

John Kasab:
I think that paper just arrives on
the scene in the C13th.  Paper does not really take over as a writing medium
until the demand for written (rather, printed) material outstrips the 
supply of available sheepskins.

Paper is a little more durable than papyrus and doesn't disintegrate
completely when it gets wet, though, so it has some advantage.  However,
like papyrus, paper has a shorter shelf-life (make that ``table-life'' :)
than parchment, and is more easily damaged by water and so on.

Michael Schloss:
Also note that paper was not made from wood.  Some was made from plant
fibers, but it was also made from linen (which, I know, is also a plant
fiber.  So sue me.)  Strangely, one significant source of linen for paper
in the 18th century was from mummies wrappings from Egypt.  No joke.

Gord McLeod:
> Were there any other kind of herbs smoked in the middle ages or are
> pipe-smoking wizards a complete anachronism?

Unless my memory is completely failing me, the 5000 year old Ice Man was
found with traces of marijuana in a pouch. Someone with a clearer knowledge
of the find and/or of the history of marijuana smoking could confirm or
deny that speculation on my part, but I'm fairly certain of it.

John Kasab:
I hope this information is useful.  Most of it comes from the book
Gies, F. and Gies, J., _Cathedral, Forge, and Waterwheel: Technology and
Invention in the Middle Ages_.  New York: HarperCollins, 1974.

I have listed the first date of appearance in Europe, which should
correspond to your ``rare in Europe'' category, and have tried to estimate
when the invention or development would be common.  I have used dashes to
indicate a missing or unknown date.

 Dates in Europe
  First    Common      What was developed or invented
========= ========  =====================================================
early C5    ---      Artes Liberales  [by Boethius]
   C7       C7       Gall-iron (black) ink
 late C7    ---      A.D. and B.C. dating [by the Venerable Bede]
   ---      C8       Motte-and-bailey castle
   ---      C8       Above-ground reduction furnace (for iron smelting)
   ---      C8       Horse collar (allows draft horse)
   C8       ---      Horizontal waterwheel (for grinding grain)
   C8       C9?      Carolingian miniscule (script)
   C9       ---      Rotary grindstone with crank handle
 late C9    C11      Stirrup 
 late C9    C11      Nailed horseshoe [mass-produced in C12]
 late C9    C11      Spurs
 late C9    C11      Curb bit (for horses)
 late C9    C11      Stone keeps [on Loire near Tours, by Fulk Nerra]
   C10      ---      Cog (carvel-constructed ship with flat-bottom hull)
   C10      C12?     Paper products [via Muslim Sicily and Spain]
   C10      C14      Use of hops in beer (a preservative)
 late C10   C11      Waterpower from vertical waterwheels [via Spain]
 late C10   C11      Open-field agriculture (crop rotation; spring/fall crops)
   C11      ---      Cog given round bottom for stability
   C11      C11      Drawplate (used to draw wire)
   C11      C11      Olive oil-based soaps
   C11      C11      Crossbow [in Italy]
early C12   C12      Cistercian Order
early C12   ---      "Artesian" well deep-drilled using percussive drilling
   C12      C12      Mechanized loom (horizontal loom with treadles)
   ---      C12      Trip hammer (vertical waterwheel-driven wheel of hammers 
                       used in forges, to hull grain, and to crush ore)
   C12    late C12   Compass (usu. south-pointing) [overland from China]
   C12    late C12   Two-masted ships (in Mediterranean)
   C12    late C12   Rudder
   C12    late C12   Condensor [by Salernus of Salerno] for distillation
 late C12   C13      Vertical windmill [invented in East Anglia, England]
 late C12   C13      Trebuchet improved by adding huge couterweight
 late C12   C13      Wheelbarrow [from China]
 late C14   ---      Canal lock gates

Tasnádi Ákos (Thaur):

Paper: Arabic paper-making since 751 (first by Chinese 
	prisoners of war). Paper in the Christian Europe: 
	9th c. (Hispania), after 1100 (Italy). Paper-making 
	in the Christian Europe (that means "Common"? :) ): 
	1260's (Hispania), 1276 (Italy).


AD/BC dating: It was invented by Dionysius Exiguus in 525. 
	That's true that Beda Venerabilis used it, and his big 
	reputation helped it to become general. It was used in the 
	Papal chancellery since the second half of the 
	10th century. (The Papal chancellery was very conservative, 
	it accepted new things and ideas very slowly...)


I recommend you to list the Latin names of the coins as well:
	English		French		Latin
	pound		livre		pondus, libra, talentum
	shilling	sou		solidus
	penny		denier		denarius
	halfpenny			obulus


Units of weight:
	I'm not absolutely sure about it (to tell the truth, I'm not 
sure at all :) ), but as far as I know, at the time of the ArM there 
was used the Tower-pound (aka London-pound, English-pound) in England 
(it was cca. 0,350 kg).
	The Troy-pound (that has French origin) and the Avoirdupois 
are later units... (the Troy-pound, AFAIK, since the 16th c. 
in England).
	I certainly don't recommend you to beleive me :), but 
I think maybe it should be investigated... 


That's not to important (it's just a single error on the map 
	in the ArM - and not the one and only :( )
Budapest: The three cities (Buda, Obuda, Pest) were united 
	in 1873. The first mention of "Buda-Pest" was in 1499, 
	and _relatively_ frequent since the 16th century...  but 
	officially just since 1873. 


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