 A naval base was established at Georgetown in 1816 due to British concerns that the French might make use of the island to attempt a rescue of their exiled former Emperor.Following Napoleon's death in 1821, the settlement found a new role as a supply, maintenance and victualling base for the West Africa Squadron.Local tufa was used for building, but everything else had to be imported (including seeds, vegetables and fruit trees, all of which were cultivated on Green Mountain to supplement the locally-available diet of turtle meat).