1856 · Iron Paddle Steamer · Werk 179 von 1.871

The starboard paddle wheel of the Cunard steamer Persia standing in a Liverpool graving dock, an iron wheel with radial iron spokes and rows of flat wooden floats fixed across the rim, plain planks of timber only, seen inside the opened paddle box against the riveted iron hull, shipwrights on timber staging, the men in cloth caps, waistcoats and shirtsleeves with hand tools, stone dock steps and timber shores.