Photographer's imprint printed on mount., Photographer's blindstamp on mount., View showing the rolling mills situated beside the Susquehanna River near the junction of the Juniata River at Duncannon, Pa. The iron works, specializing in nails, was established in 1828 by Stephen Duncan and John D. Mahon and purchased by Duncannon Iron Company in 1861. The rolling mill ceased operations in 1908.