Hi Pejic,
If the marriage listed by Kimbrey is yours, then the entry is on the Berks Marriage Index (ex BFHS) with the additional info for Martha Cox being "of Welford"
In the Berks Burial Index they are also listed as follows;
Kintbury St.Mary;
20-11-1791 Mary LEADER - wife of Thomas
15-2-1807 Thomas "
Hope these help.
Alan