 Complete the following phrase:  In August 1799, hearing that the guards were going on active service, he exchanged into his old regiment as captain and lieutet-colonel, and served with it in the Anglo-Russian invasion of Holland. In the same year he married Miss Lucy Charlotte Hamilton, the daughter of Colonel Hamilton, of the Coldstream Guards, eldest son of Lord Anne Hamilton and a nephew of the Duke of Hamilton. The next year, though only a lieutet-colonel, he was selected by Sir Ralph Abercromby to be quartermaster-general of his army in the Mediterranean, at the same time that another young Scotsman, John Hope, who was also to gain fame in 