Hi Jan
And I thought I was starting my search for Robert early enough at 1760, making him 47 when he married! Just glance at the previous year and I would have found him.
Turkdean must have been a tiny parish. In some years there were no baptisms or marriages at all, in others just a handful.
You might find the following Taylor burials of interest:
Thomas 20 Aug 1780
Sarah 29 Dec 1780
John 25 Nov 1781
Thomas 31 Mar 1784
Mary Jane 18 May 1789
Henry 7 Aug 1789
Margaret 12 Oct 1791
Simon 5 Jul 1798
Hannah wife of William 18 Aug 1803
Jane infant daughter of Robert & Anne 23 July 1809
Unfortunately no indication of age against these names or other details, but some of these might refer to your family, particularly the Henry - it could have taken some time to prove his will. Gloucester RO may have a copy of the will. I'll ask next time I'm down there, also take a look at the earlier and later BTs, if available.
There were no Browns at all in the years I looked at (1760-1810), which makes me wonder if Anne was a widow when she married Robert or was baptised in another parish. The BT didn't say whether she was a spinster or a widow. No Anne married a Mr Brown earlier than 1807 in Turkdean, as far as I could see.
Looking for Anne's baptism on the IGI I found these members' submissions (beware!)for baptisms in Cirencester, 12 miles away from Turkdean:
Ann(e) daughter of John Brown 10 Jul 1771 and 19 Feb 1775
Just a thought.
Gillg