"This first edition, printed on permanent all-rag paper, is limited to five hundred copies." --Pref.
The region described comprises mainly the counties of Lancaster, York, Berks, and Montgomery and some portions of Bucks and several other counties, without completely covering any county.
The last chapter contains a brief account of the author's maternal great-grandfather, Matthias Helm of Freeburg, Pennsylvania.
"William Henry Egle was a physician, author and historian who served as the State Librarian of the Commonwealth of Pennsylvania from 1887 to 1889. His body of work documented Pennsylvania's history from its founding through the late 19th century - excerpts of which continued to be reprinted in newspapers following his death in 1901 and are still cited as references by present-day historians and professional genealogists." [from Wikipedia]