Ledger of debtors and creditors of the Medici family for the years 1537-1539. Often includes the nature of a given credit or debt and its amount, as well as listing the names of the individuals or institutions that hold the debt or credit, the most important being the Spedale e Spedaletto di Santa Maria Novella (p. 7, 22), a Florentine church which also offered pilgrims and those in need medical help; the Chapitolo and Convento delle monache delle convertite (p. 17), a nunnery for young women, often prostitutes, who converted to Catholicism; and the Opera di Santa Maria del Fiore (p. 60). An alphabetical index, with 18 lettered tabs, containing names of individuals and institutions that appear in the ledger, is laid into the manuscript.