Murray, James. Kilmacolm : a parish history, 1100-1898. (Paisley, Scotland: Alexander Gardner of Paisley (1898); Genealogical Society of Utah (1961)), Pages 228, 229.
Sir Patrick Maxwell was like his neighbour Glencairn, a staunch supporter of the king in his conflict with the Parliament; and, in reward for his services, Charles conferred on him the honour of knighthood. He married Marion, daughter of Sir Dougal Campbell of Achinbreck. He had several sons, among whom he partitioned his family estates, his eldest son, George, succeeding to the lairdship of Newark. It was he, who, in 1668, sold the lands of Devol’s Glen to the city of Glasgow, who erected there the harbour of Port-Glasgow. He died in 1678.