Other than that others may have an idea for you how to further research him;
I just googled John Mills
Captain John MILLS 1727-1811'
A Biographical Dictionary of Actors, Volume 15, Tibbett to M. ... - Google Books Result
Philip H. Highfill, Kalman A. Burnim, Edward A. Langhans - 1993 - Biography & Autobiography - 384 pages
... the Savoy, on 24 October 1767 Capt John Mills (1727—18 1 1), then a civil servant, one of the survivors of the Black Hole of Calcutta. ...
Info on his Wife Isaballa formerly Mrs Vincent a well know Actress in 1767;
John MILLS (1727-1811) was then a Civil Servant, and one of the survivors of the Black Hole of Calcutta........
If you keep reading on it mentions John and Isabells Children together;
John Wedderburn MILLS
Samuel Thomas MILLS, 15 March 1769
Alfred MILLS 1776-1833, Painter and Engraver
+ a possible Daug Elizabeth.
Possible engravings/portraits exist of them.
Trish
