Index Possessorum Incunabulorum

Some years ago Paul Needham kindly gave me a copy of his Index Possessorum Incunabulorum (IPI) on CD, but is has now been made available online through the CERL website

"IPI contains some 32,000 entries of personal names, institutional names, monograms, and arms pertaining to the ownership of incunabula. They were extracted by Paul Needham from some 200 published catalogues of incunabula with provenance information, augmented with information from his personal research, and placed in a word file of some 1,267 pages or 500,565 words. Of course most of these entries are of relevance to provenance research on manuscripts and later printed books as well, as these characters owned and collected books of many periods, not just incunabula."