Rick & Heidi, I just found a clipping that was folded up in the History of Industry. . . book regarding the furnaces. It states, "Perhaps the best, single source of information about the Ohio iron industry is a publication offered by the Ohio Historical Society, Columbus, Ohio, 43210. Called "The Hanging Rock Iron Region of Ohio" written by H. R. Collins and D. K. Webb, Jr. It is a complete story about the buckeye iron era from 1818 to 1916. A map shows where a total of 46 furnaces were erected and the 17 stacks that still remain. This is an old publication and I'm sure it is no longer offered for sale but I would imagine that most libraries in Ohio that have a good genealogy section might have this. Also, you maybe able to get copies of it by writing to the Historical Society in Columbus or the State Library. JJJordan