He was an important person in Philadelphia; I think he was in charge of customs there in the 1780s. There is correspondence of his in the published George Washington Papers.
Somewhere I found a source that mentioned a book which had a bookplate of his with the arms of the Falconers of Halkerton, that is, the family of the Lord Falconer of Halkerton, of Scotland. He must have been a descendant of that family, which I've traced, or at least thought he was. But I don't know his origins. Presumably he was born in England.