In June 1829 a Lieutenant of the Royal Engineers, Henry Brandreth, arrived on Ascension with a remit to survey the facilities there and make recommendations for their improvement. He condemned what he found as, for the most part, 'miserable tenements ... inhabited by vermin'. Together with the local commandant, he recommended re-establishing the settlement a little way back from the sea on the elevated plateau which Georgetown occupies today. Having returned to England to oversee the supply and manufacture of certain items for the island, he returned in 1830 to begin work on this project. A key innovation was the construction of St George's Water Tank, which can still be seen today: water was channelled to it from the mountain top, as well as from every roof in Georgetown, and from here it was fed by a windpump into a header tank for distribution to local buildings (and, via a pipeline, to the pierhead for transfer to ships). The Marine Barracks building also dates from this period, as do several other buildings including Georgetown's hospital, which continues to fulfil the purpose for which it was built.