edinburgh62 The Netherbow Wellhead This wellhead or cistern is the oldest of the surviving cisterns designed by Sir William Bruce, surveyor of the Royal Works, and first built by Robert Myine, King's Master Mason, in around 1675. It has been rebuilt. The cisterns provided water from Comiston Springs via the Castlehill Reservoir for the inhabitants of the Old Town. The netherbrow wellhead was repaired and restored to use with a basin and running drinking water by the Edinburgh Old Town Renewal Trust and Lothian and Edinburgh Enterprise Limited in 1997. Cisterns like this one were the only water supply in the city until 1822.