The Lascelles family was spread across Northern England, with branches living in Northallerton, Durham, Whitby, York, Harewood House and Terrington.

[10] Grants was disbanded in 1718 and his movements immediately following this remain unclear; in 1723, he was a captain in Churchill's Dragoons, which performed garrison duty in different parts of Britain, primarily the West Country.

[12] As a result, in the expansion that followed the outbreak of the War of the Austrian Succession, in 1743 Lascelles was made as Colonel of the 47th Foot; raised in 1741, it was employed on the construction of a military road near Loch Lomond, part of a new route from Dumbarton to Inverary.

After detaching two companies to garrison Edinburgh Castle, Lascelles and the rest of his regiment joined the field army commanded by Sir John Cope.

[16] Lascelles and his regiment were posted to Nova Scotia in 1750; conflict between British and French settlers resulted in a series of clashes known as Father Le Loutre's War, the most significant being the June 1755 Battle of Fort Beauséjour.

[19] It is not clear when he ceased active service, since it was common to retain the position of Colonel, but delegate operational command; he formally resigned from the 47th Regiment in July 1768.