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McCullough Iron Company produced the first galvanized sheet iron in the United States, and then went on to produce charcoal blooms and iron bars. The Octoraro Rolling Mill was built in 1828, originally owned by Joseph Roman and purchased by McCullough & Co. in 1857. It operated until 1893. This item is a panoramic-type nineteenth century albumen photograph showing the town of Rowlandsville, Maryland, on Octoraro Creek in Cecil County. The iron-works may be in the distance, and the houses may be predominantly worker's housing.