There is an interesting possible connection between Lt. Dugald Campbell, promoted later to Captain, and a leader in New Brunswick. First he was appointed an officer in the prestigious Black Watch 42nd Regiment which meant he had to have some high connections. He was young at the time. There is no current record of his own parents, yet it was believed at the time that he was connected to the ruling clan head. He suffered a wound at the same battle in Charleston Harbor in which Lord William received his own ultimately fatal wounds. Lord Williams own children are not well documented anywhere even though he was the son of the 4th Duke of Argyll,a very unusual ommision. Lord William moved to New Brunswick at the same time Dugald's own unit went to New Brunswick. Lord William spent little time with his family in Canada, often leaving for long periods of time, even going to England without them. He saw duty before family. He did not seem to display much concern for them and his absences were not understood at that time. While this is purely speculative, it may have been the classic father and ignored son syndrome. Given the small population numbers and locations involved, the statical probabilities are high for a direct relationship. Dugald may well be a son. I'm still searching for other records in Scotland but the Canadian records seem to provide some connection.