His health had broken down, and he visited the West Indies, where his wife died of yellow fever.
The genus Pyrophorus contains about ninety species, and is entirely confined to America and the West Indies, ranging from the southern United States to Argentina and Chile.
Forsaking the priesthood about 1864, he was employed as a diplomatist by the British government in Egypt, Asia Minor, the West Indies, and Bulgaria, being appointed resident minister in Uruguay in 1884; he died at Montevideo on the 30th of September 1888.
In 1830 and 1831 he took part in the Dutch campaign in Belgium, and in 1844, after being promoted to the rank of general, was sent on an important mission to the Dutch East Indies to inquire into the state of their military defences.
For Portugal, completed in 1886 for the Portuguese possessions in the Indies; in force.