These Abbey’s accounts seem to be a historical reference of a sort, but the only historical thing I can find is a man by the name of Beaulieu Abbey, but he's in the 13th century. So what are these Abbey’s accounts? And why is a plural noun preceded by a singular article?he engaged with a powerful lens deciphering the remains of the original inscription upon a palimpsest.
"[...] So far as I can make out it is nothing more exciting than an Abbey’s accounts dating from the second half of the fifteenth century."
Source: The Return of Sherlock Holmes by Arthur Conan Doyle (THE ADVENTURE OF THE GOLDEN PINCE-NEZ )