On the Roman Empire’s cold and rainy northern frontier, in what is now Britian, sat the fort of Vindolanda. Beginning in 1973, excavators there began to find waterlogged tablets and fragments of tablets covered with Roman cursive writing. Once conserved and deciphered, the tablets provided rare details of the daily life and workings of the fort -- lists of necessary supplies, including bacon, oysters, and honey; a letter to a soldier from home saying that more socks, sandals, and underwear have been sent; and descriptions of the native Britons the Romans came into contact with. Among the tablets -- the...