The main impetus for a canal came from the owners of mineral rights. The London Lead Company met with the Duke of Devonshire, the Duke of Newcastle, and others, but proposals were actively supported by the towns of Chesterfield, Worksop and Retford. Retford had obtained an Act of Parliament in 1720 to improve the River Idle from Bawtry to the town, but very little work was done to implement the scheme. In addition to being a market town, Retford also manufactured bricks and tiles, had reserves of gravel, and produced an agricultural surplus. In 1769, a steering group produced a pamphlet extolling the advantages of a proposed canal, which was available to everyone, but was primarily addressed to the Duke of Newcastle, Lord George Augustus Cavendish, and the MP for Derbyshire, Godfrey Bagnall Clarke.