"David" . . . . . . . . . . . . . . . "David Borthwick (public servant)" . . . . . . . . . . . . . . . . . "David William Borthwick" . . "David Borthwick" . . . . . . . . "David William Borthwick" . "1950" . . . . . . . . . "1950-12-26" . . . . . . . . "David Borthwick (public servant)" .