The “Edward Patterson” was built in May 1872 by Baldwin with the works number 2819 for the Ashland Iron Co. in Kentucky. It later came to Maryland Steel. It was a small two-axle saddle tank locomotive that was nevertheless powerful thanks to its small drivers. Locomotives in this size were built by several manufacturers and were used from the second half of the 19th century in large numbers by industrial, agricultural and forestry operators. In many places, they replaced draught animals, which increased transport capacity and reduced costs. 