Hello there Jill!
I do have a charles Holmes 1793 down as a question mark, as a son, so it is wonderful that you have clarified it for me. I also have a Mary Holmes 1790 Hambleden, down as theirs as well, as they were married there. I also have a John Holmes 1792 Great Marlow down as a possible son. But then back in Hambleden again, there is a James Holmes 1797. Maybe they did flit between the two places?
The only Thomas Holmes Senior with the right sort of dates i can find, lived no where near Great Marlow.
The 5 i can find where Thomas Holmes 1763 Compton Berks, Thomas holmes 1769 Arborfield Berks, or Thomas Holmes 1760 Milton Keynes, Bucks, Thomas Holmes 1770 Iver, Bucks, or one in 1770 Lavendon. I have not checked Oxfordshire though.
If you can find a Thomas Holmes in Great Marlow or nearer, that would be fantastic!
This area of my tree has had me pulling my hair out for years!
Thank you for your time and efforts Jill. I shall keep my fingers crossed.
Sally-Anne