Francesco Sacchini recommends two notebooks inDeratione libros cum profectu legendi libellus(Wu ̈rzburg, 1614), chap. 13, p. 91: “Not unlike attentivemerchants . . . [who] keep two books, one small, the other large: the first you would calladversariaor a daybook(ephemerides),the second an account book(calendarium)and ledger(codex).”