Some of this data, including the complete data files for the 1427-30 Catasto for the city of Florence and its territorial dominions, and Catasti for the city of Verona in 1425 and 1502, are available through the Data and Program Library Service of the University of Wisconsin (see below). Other data sets on his computers mostly concerned office holders in Florence between 1282 and 1532, which he was preparing for a major study. Although this material appears to have been largely complete at the time of his death, he had written only one article on the subject: "The Rulers of Florence, 1282-1530: Oligarchy, Democracy, Principate" in A. Molho, K. Raaflaub, and J. Emlen, eds., City States in Classical Antiquity and Medieval Italy: Athens and Rome, Florence and Venice (Stuttgart: F. Steiner and Ann Arbor, Mich.: University of Michigan Press, 1991) pp. 197-221. Since 1999 the office holding data (in three series: Tre Maggiori, Guild elections, and Birth dates—c, 166,000 records) have been translated from their initial unusable format, checked against the original registers in Florence, completed, edited, and published on the world wide web as the Online Tratte.
The Data and Program Library Service | Social Science Building | University of Wisconsin | Madison, Wisconsin (53706) distributes both David Herlihy's initial files and the Robert Darcy cleaned-up and rectangularized edition. The Darcy edition is accompanied by an SPSS program for reading the data. The files are: 1) Census and Property Survey of Florentine Domains in the Province of Tuscany, 1427-1480 [The Catasto of 1427-30 for all of Florentine Tuscany plus 1/10 samples of the Catasti of 1458 and 1480 for the city of Florence--some 740,000 cases in all]; 2) Census and Property Survey (Partial) of the City of Verona, Italy, 1425 and 1502; 3) Census and Property Survey of the Diocese of Florence, Italy, 1427-30 [Ecclesiastical returns for the city of Florence and its immediate territory in 1427-30]. The data are divided into sub-files that correspond to David's series codes. Cf. J. Paul Bischoff and R. Darcy, "Reformatting the Florentine 'Catasto' for use by standard statistical analysis programs" in Computers and Medieval Data Processing XI (October, 1981), pp. 5-7.
The microfilm sets differ in completeness. The Wisconsin set (48 microfilm reels) contains deliberations of officials of the Catasto and Catasto registers for the city of Florence and the Florentine contado, plus Pistoia (Campioni [the summary volumes] and Portate [the initial uncorrected declarations] for the city of Florence plus Campioni for the Florentine contado and for the city and contado of Pistoia) in 1428-30. The Center for Research Libraries and Harvard sets contain an additional 36 microfilm reels of Portate for the Florentine contado and for the city, contado, and mountains of Pistoia. Aside from Pistoia, the microfilm sets do not include material from the Florentine "Distretto": Cortona, Arezzo, Pisa, Volterra, etc.