THE CARD INDEX OF LEO S. OLSCHKI. THE INNER WORKINGS OF AN ANTIQUARIAN BOOK BUSINESS

This article investigates how the card index of Leo S. Olschki can be used for the study of antiquarian book trade in the first half of the twentieth century, focussing specifically on medieval and Renaissance manuscripts. It demonstrates how the index can provide evidence on provenance, buyers, purchase and sale prices, and other aspects of book trade such as the drafting of sale catalogue entries