essay in Professional Surveyor magazine: Part 1 Part 2 Image of one of Holme's maps from the Lower Merion Historical Society "Portraiture of the City of Philadelphia" (1683), by Thomas Holme Brief biography at virtualology.com 1624 births 1695 deaths People of colonial Pennsylvania American Quakers Converts to Quakerism People from Lancashire (before 1974) Roundheads 17th-century Quakers History of Philadelphia American cartographers English emigrants