[See larger version]From the Picture by Robert Hillingford.There were other matters which the British representative was to bring forward, and foremost[232] among them all was the suppression of the slave trade, either by a general declaration from the Allies that it should be treated as piracy, or by obtaining from them an engagement that they would not admit into their markets any article of colonial produce which was the result of slave labour. "It will be seen," says Mr. Gleig, "that the recognition of the actual independence of many of the Spanish colonies had already been determined upon by Great Britain, and that the establishment of diplomatic relations with them all had come to be considered as a mere question of time. This is a point worthy of notice, because of the misunderstanding in regard to it which originated in a speech subsequently delivered by Mr. Canning in the House of Commons, and which still, to a considerable extent, prevails. It will be further noticed that the principle observed by Lord Londonderry as the true principle was that of non-interference by Great Britain in the internal affairs of foreign nations. That the Duke of Wellington entirely coincided with Lord Londonderry in this respect, his conduct both now and in the future stages of his career clearly demonstrates. The leading object of his political life was to preserve the peace at home and abroad which it had been the great aim of his military life to conquer."