Not sure who the original poster is but.... As best as I can find Franklin Forge was on Den Brook. Den Brook runs from Lake Estling through Laurel Lake to Lake Openaki. Since it was called Franklin Forge it is probably close to either Franklin Ave. or Franklin Road, both of which are in Denville. It could be either side of Rt. 10 and still would be in Denville. I see a place on the map called Old Mill Drive which is near Smith Rd. off of Mt Pleasant turnpike. If you cross 10 on Smith Rd. and continue to Van Dorn Pl. take a right and it ends on Old Mill Drive. Down near Union Hill. History of Morris County says: On Den Brook, a tributary of the Rockaway were built Shongum forge; Ninkey forge; lower down the stream Coleraine (or Cold-rain) forge and still lower Franklin forge, built by John Cobb, Thomas Brown and Stephen Jackson just previous to the war. page 42, History of Morris County, New Jersey with Illustrations and Biographical Sketches of Prominent Citizens and pioneers, reprint orig. pub New York: W.W. Munsell & Co., 36 Vesey Street, 1882; press of george Macnamara, same address. republished by Morris County Historical Society, Morristown, NJ 1967; reproduced by Compton Press, Inc. -- Diane Ward Sives