"Naval Mast Trade
Large masts, cut for the Royal Navy from the finest trees of the mixed forest that swept through the Maritimes and the St Lawrence Valley, were the most valuable commercial product of British North American forests. The naval mast trade, always limited by its specialized and high quality requirements, shifted from the Saint John to the St Lawrence Valley early in the 19th century when contractors sought oak, as well as pine, from the deciduous forests of the southern Great Lakes area. The square timber industry developed rapidly to meet the enormous demand from Britain, which was at war with Napoleonic France and was also undergoing industrialization. In 1806, in an effort to strangle Britain’s economy, Napoleon established the Continental Blockade, closing all European ports to British ships. Because Britain’s traditional source of timber, the Baltic, was not accessible during this time, the Blockade further fuelled the British North American industry. On average, 9,000 loads (almost 1.5 m3 each) of colonial timber entered Britain annually between 1802 and 1805, and that number only continued to grow: In 1807 the total was 27,000; in 1809, 90,000; in 1840 over 500,000; and in 1846, 750,000. Thereafter imports fluctuated for 20 years around 600,000 loads and then declined until WWI."
Jolly good reading for a Christmas Eve, wot?:)