Kelso
a market-town of Roxburghshire, England. It stands on the N. bank of the Tweed, her joined by the Teviot, and spanned by Rennie's noble five-arch bridge (1803). In 1126 David I. translated to "Calchou" a Tironensian abbey, founded by him at Selkirk, 13 years before. This, wrecked by the Eng lish under Hertford in 1545, is now represented by the stately ruins of its cruci form church. Across the river, on the peninsula formed by the Teviot, the royal castle and town of Roxburgh, demolished in 1460. Pop. about 4,000.