 After completing his education, he travelled into France and Italy; and leaving Rome in August 1727, arrived in London in the autumn of that year.He was soon after appointed a Deputy Lieutenant for Suffolk on 20 December that year.By virtue of a warrant by Charles FitzRoy, 2nd Duke of Grafton, the Lord Chamberlain, Calthorpe was sworn and admitted as a Gentleman Usher Quarterly Waiter in Ordinary on 1 October 1731.