Henry Le Mesurier prospered through privateering, and moved the harbour from Longis to Braye, building a jetty there in 1736. Warehouses and dwellings were built at Braye, and the export of cattle generated wealth for the economy. The Court House was built in 1770 and a school in 1790. A Methodist chapel was constructed in 1790, following John Wesley's visit in 1787. An Optical telegraph tower was constructed above La Foulère in 1811, enabling signals to be relayed visually to Le Mât in Sark and on to Guernsey – early warning of attack during the Napoleonic Wars was of strategic importance. With the end of those wars privateering was ended and smuggling suppressed, leading to economic difficulties.