This site has some really interesting stuff. Almost all understandable by pretty much anyone.
https://www.history-of-mathematics.org
Nice info. Thanks.
I've been transcribing early photos of old gravestones for the past hour.
I misread the "a" in your third word for an "e," and was trying to figure out how that would work, exactly....
;--}
M.
I also posted this link, in thread about online exhibits. Great minds think alike!
Related to the actual topic of the post: A math professor at Columbia University in the 1940s-50s-60s collected early examples of numeracy of different kinds. He donated them to the Columbia University archives.
I ran into this because one of the groups of medieval manuscripts I work on included pages from his collection, showing how 15th c. accounts for a cathedral's canons were kept in roman numerals rather than Arabic ones, because the texts were all in Latin, so they kept the numbers consistent with that.
So I called for them and got to look through them. He had a number of anomalous things like that, very interesting.
M.