The County of Peebles was the world's first four-masted, iron-hulled full-rigged ship. It was built during 1875, by Barclay Curle Shipbuilders in Glasgow, Scotland, for the shipping company R & J Craig of Glasgow. Measuring 81.2 metres long, with a beam of 11.8 metres, a draught of 7.1 metres and a cargo capacity of 1,614 net register tons (NRT), it was a state-of-the-art windjammer when it began its use, for the jute trade between the ports of Dundee and Cardiff in Great Britain and Bombay and Calcutta / Hooghly River in East India. Its rig was 'Scottish style', with royal sails above double top-sails and single topgallants.

Iron-hulled sailing ships represented the final evolution of sailing ships at the end of the age of sail. They were built to carry bulk cargo for long distances in the nineteenth and early twentieth centuries. They were the largest of merchant sailing ships, with three to five masts and square sails, as well as other sail plans. They carried lumber, guano, grain or ore between continents. Later examples had steel hulls. They are sometimes referred to as "windjammers" or "tall ships". Several survive, variously operating as school ships, museum ships, restaurant ships, and cruise ships.