PERSI (the PERiodical Source Index) is the world’s largest and most widely used subject index for U.S. genealogy and local history literature. Over the past 30 years, the Allen County Public Library (ACPL) Genealogy Centre has created more than 2.5 million searchable records in PERSI, indexing every article from more than 8,000 different periodicals. These include magazines, newsletters and journals, indexed according to location, topic, surname, ethnicity and methodology.

This latest release includes images of the original periodicals, which Findmypast has matched to the index as part of our promise to launch the most complete version of PERSI online. The new periodicals are comprised of issues from 18 different publications covering a period between 1824 and 1923.