Thanks for the input, folks. I've located more biblio. According to my source book, Green lane Forge was located twenty miles north of Norristown and 40 miles north of Philadelphia. Its original owner was Thomas Maybury, "the earliest settler in Marlborough Township" who "bought a tract of land, twelve hundred and forty acres on which he erected this forge (later - ed. note) owned by Rev. George Michael Weiss before 1767. The workmen here, at one time, were mostly negro slaves." The author goes on to say, citing T.W Bean's HISTORY OF MONTGOMERY COUNTY" (to which I don't currently have access) "The forge has long since gone into decay; "the old water wheel, the huge bellows, the ore crushers, the cone-like charcoal kilns, the famous weekly teamsters who made their trips to town and back; the huntsman and his hounds- these are all gone; and Green Lane is an ordinary railroad village." So the information you have provided seems to fit the present location you have given, and I thank you. I do find it sad that historical markers do not pinpoint the sites of so many of these colonial industries which many of the German immigrants owned and/or labored in (many of these immigrants number among our ancestors). Names of ironmasters such as William Henry Stiegel and John Jacob Huber, who married the daughter of Heinrich Wilhelm Steigel and named his Elisabeth Furnace for his wife (what a love story!) abound, along with German ironmasters John Lesher, Gerrard Etter, John Probst, Peter Schoenberger and Valentine Eckert. Of particular interest to me is locating a forge somewhat closer to Germantown as background for a setting for a historical fiction I am writing, only one aspect of 18th century research for this novel. I would be most appreciative if anyone out there could help me pick the ideal setting because I do not live near the counties where these industries took place.