They arranged the more important propositions, r�sum�s, and axioms in alphabetical order or by subject matter, including mnemonic verse.
2.
One of the earliest uses of mnemonic verse to teach Latin was the " Doctrinale " by Alexander of Villedieu, which was an entire grammar of the language comprising 2, 000 lines of doggerel verse produced in 1199 . It was used as a standard Latin grammar textbook across Europe for three centuries, and continued to be used in Italy and other places until relatively recently.