Hi DebbieG,
Taken from the Berks Burial Index (issue 9) (ex BFHS) is this burial;
20-11-1785 John HART, bur. Purley, St.Mary the Virgin - could this be yours??
Also I have a printed book of marriages(1662-1840) for Purley and this entry is listed;
5-4-1722 John HART, P, Hurst. to Priscilla TEGGUS, P, Pangbourne. By Licence.
I haven't worked out what the letter P stands for- it appears against many entries.
This may be of some help.
Alan