Thomas Græme, 31st March 1770.
Thomas Stirling, 12th December 1770.
William Murray, 7th September 1771.
William Grant, 5th October 1777.
Charles Graham, 25th August 1778.
Patrick Graham, 21st March 1780.
Walter Home, 28th April 1782.
John Campbell, 23d October 1781.
Hay Macdowall, 24th March 1784.
George Dalrymple, 16th March 1791.