Dr. Susan E. Klepp, a Mellon Fellow in Bibliography at the APS in 1986-87, suggested to the Librarian that the publication of the APS collection of Phila. mortality bills from 1722 to 1859, together with those from other repositories which APS does not possess, would constitute a major research resource for students of early American and comparative history. Dr. Klepp has not only executed that task skillfully, but she has given us a fine brief history of the study of the vital statistics of Philadelphia together with an annotated bibliography of secondary works. Contains over 200 broadsides.