WINDSOR CASTLE 1876. The 1732 ton mail steamer Windsor Castle of the Currie Line sailed from London on 20th September 1876. At 2 a.m. on the morning of 19th October she was wrecked on Dassen Island, about 50 miles north of Cape Town. Passengers and the mail were picked up by the steamer Florence and were landed at Cape Town the following day. This cover, that has the original letter with it, arrived in Grahamstown on OC 25. Donald Currie established the Union Castle Line which came into service when the Currie Line and the Union Steamship Co were merged in 1876. So this would have been the first Union Castle Line wreck. A very rare cover from this wreck, which is not mentioned in Hoggarth & Gwynn.