These three volumes contain possibly the most authoritative collection of Pennsylvania genealogies ever assembled, covering fully 250 Colonial and Revolutionary families in a series of independent genealogical narratives. Extending from two or three pages to twenty and thirty pages or more, the genealogies generally commence with the known ancestors of the first Pennsylvania settler and proceed in the direct line of descent to representatives of the family in the late 19th and early 20th centuries, touching, in this manner, on as many as eight or more generations, each member of which is scrupulously accounted for by name, spouse, issue, and dates of birth, marriage and death, surfacing again, in many cases, as the subject of a biographical essay.