Although the actual coverage of this magnificent collection of birth records is confined principally to the counties of Berks, Northumberland, Snyder, and Union, it does, in instancing several thousand births from eastern and southeastern Pennsylvania and the middle and southern sections of the Susquehanna Valley, encompass a significant portion of the state of Pennsylvania. The text is arranged alphabetically in each of the several sections by the surname of the principal subject. As a general rule data given include the name of the child, date of the birth or baptism, names of the parents, and names of sponsors (often relatives). By any conservative estimate at least 10, 000 persons are mentioned in the text.