 Records of frequent drownings indicate that many poorer citizens collected water from the Thames or nearby streams running into the Thames.The Grand Conduit system was extended over the centuries and in the 15th century was supplemented by a conduit from springs at Paddington, and another at Highgate which supplied Cripplegate.In 1582, Dutchman Peter Morice (died 1588) developed one of the first pumped water supply systems for the City of London, powered by undershot waterwheels housed in the northernmost arches of London Bridge spanning the River Thames.