Who is this wee guy?

Seldom do we not know the names of male portraits, unlike female portraits whose identities are soon forgotten.Anyway, this miniature is clearly a momento for the child’s family, as he leaves to join the Army — or the Navy? Do his jacket buttons have a nautical air? His fair locks suggest a Wardlaw connection, so I’m tentatively suggesting it shows Wlliam Wardlaw as a boy, on his way to Portsmouth, to join the East India Company. Maybe!

Who is he?