sentences:  It soon became a liability and was sold, for £120,000, to the West India Dock Company, owner of the adjacent West India Docks, in 1829.The company bought it mainly to prevent it from falling into other hands.Proposals for collier docks immediately south of the City Canal, and the opening of the St Katharine Docks in 1828, had heightened the company's awareness of the threat represented by other dock interests.