Early Alphabetical Mnemonics

From A Place for Everything, by Judith Flanders (Basic Books, 2020), Kindle pp. 46-47:

In Europe, ... where alphabetical order was used, in many cases it was considered not as a tool of reference but as one of recall, a way of imprinting a series of items onto the memory in a culture that continued to rely heavily on oral transmission. It may be for this reason that the second-century Sentences of Sextus, 123 maxims on how to live a philosophically good life, were arranged in alphabetical order. Or it may not have been: once again, all we have are later copies, which might well have been reordered. (And, in addition, the named author, Sextus the Pythagorean, is unlikely to be the actual author of the work.) We know this type of reordering was routine. Fables by an author named Babrius, some of which are today collected under a generic authorship as Aesop’s Fables, survive in copies that were organized by the first letter of the opening word of each fable. Yet an Oxyrhynchus fragment of the same fables, dating from the second century, shows that at least one earlier version was not in this order. The purpose of the reordering may well have been to help listeners remember the stories so that they, in turn, could retell them. For memory was a recurring component of alphabetization: the Greek grammarian Athenaeus listed eighty-one species of fish in first-letter alphabetical order, “in order that what is said may be easier for you to remember.”