The Thames Embankment is a work of 19th-century civil engineering that reclaimed marshy land next to the River Thames in central London. It consists of the Victoria Embankment and Chelsea Embankment. There had been a long history of failed proposals to embank the Thames in central London. Embankments along the Thames were first proposed by Christopher Wren in the 1660s, then in 1824 former soldier and aide to George IV, Sir Frederick Trench suggested an embankment known as 'Trench's Terrace' from Blackfriars to Charing Cross. Trench brought a bill to Parliament which was blocked by river interests. In the 1830s, the painter John Martin promoted a version, as realised later, to contain an intercepting sewer. In January 1842 the City Corporation backed a plan designed by James Walker but which was dropped due to government infighting. The government itself built the Chelsea Embankment in 1854 from Chelsea Hospital to Millbank. Started in 1862, the Victoria Embankment starting from Millbank on the main, north (or "left" bank) was primarily designed by Sir Joseph Bazalgette with architectural work on the embankment wall and river stairs by Charles Henry Driver. It incorporates the main low level interceptor sewer from the then limits of west London's growth, and an underground railway over which a wide road and riverside walkway were built and run today, shored up by the sturdy retaining wall along the tidal River Thames (the Tideway). In total, Bazalgette's scheme reclaimed of land from the river. It prevented flooding, such as around what had been the remnants of Thorney Island, much of which was owned by the Duke of Westminster. Those waterfront hotels, supply warehouses and genteel "town houses" which had boat access by inlets and watergates lost this. Much of the granite used in the projects was brought from Lamorna Cove in Cornwall. The quarried stone was shaped into blocks on site before being loaded on to barges and transported up the English Channel into the Thames.