The decline in prosperity of the British West Indies after 1815 was so rapid as to obscure their importance during the Napoleonic War; but of their commercial pre-eminence among British colonies at that time there are many proofs. Thus, on 12 September 1804, while watching Toulon, Nelson, who knew them well, wrote in a lately published letter, “…I think the French will some day send their fleets to sea, and that the West Indies … is (sic) more likely for them to hurt us in than this country. We have but few troops to defend our islands and recent conquests; 10 or 12,000 French troops would injure us more there than in any other part of the world.” Herein he agreed with Dundas, who in August 1796 stated to Earl Spencer, First Lord of the Admiralty, that far more harm would result to our commerce and credit from a French invasion of Jamaica than of Great Britain or Ireland. As is well known, Nelson in April 1805 acted on his conviction recorded above, and, despite the perilously scanty news as to the course of the Franco-Spanish fleet, he chased it to the West Indies because of his conviction of the immense importance of those colonies. Lord Barham, now First Lord, approved his action; for he himself had come to the conclusion from the French moves against those colonies, “that depredation and the destruction of our trade is their grand object,” and that the invasion of England was now a secondary object. This view was for the present somewhat exaggerated; for Napoleon, who overworked his admirals even more than his generals, expected Villeneuve and Gravina first to devastate our Leeward Islands (with Tobago thrown in) and then to fly back, along with Ganteaume's fleet, to cover the invasion of England.