The brilliancy of Beresford's achievement in capturing Buenos Ayres with a handful of men had dazzled the minds of English statesmen, who felt that 10,000 British troops were enough to subdue the whole of the vast continent of South America. In May, 1807, an expedition comprising several frigates and transports with 5,000 troops appeared off Montevideo from England. A month later Lieutenant-General Whitelock arrived with orders to assume the chief command, and among his officers were the gallant Irishmen, Major Vandeleur, who commanded a wing of the 88th Regiment, and Lieutenant-Colonel Nugent, of the 38th. Whitelock endeavored, but failed, to retake Buenos Ayres. During the siege a small detachment of Spanish troops under Colonel James Butler, after a terrific conflict, in which they sold their lives dearly, were all killed. Agreeably to Colonel Butler's request his remains were buried on the spot he had so valiantly defended, and his tombstone was visible there until 1818. It is a remarkable fact that several of the South American countries, Mexico, Peru, and Chile, were governed by viceroys of Irish birth in the critical period preceding the Independence, although Spanish law forbade such office to any but Spaniards born. It was in recognition of gallant services in Spain, in combination with the Duke of Wellington, that General O'Donoghue was made viceroy of Mexico in 1821, but the elevation of the great viceroy of Peru, Ambrose O'Higgins, was due to the splendid talents of administration already displayed by him during twenty years of service in Chile. He was born at Summerhill, Co. Meath, about 1730. An uncle of his was one of the chaplains at the court of Madrid, and at his expense O'Higgins was educated at a college in Cadiz. He then entered the Spanish engineer corps, and in 1769 was given the command of the commission sent to Chile to strengthen the fortifications of Valdivia. He was made captain-general of Chile in 1788, was subsequently created marquis of Osorno, and in 1796 was nominated viceroy of Peru, a position which he held until his death in 1801.