Hi
The IGI covers Caterham parish registers
http://freepages.genealogy.rootsweb.ancestry.com/~hughwallis/IGIBatchNumbers/CountySurrey.htm#CNo Washbourns.
There is a Tillingdown Hill near Caterham which had a farm. Can't see a manor though
http://www.surreycc.gov.uk/sccwebsite/sccwspages.nsf/LookupWebPagesByTITLE_RTF/Tillingdown?opendocument10th February 1841 Christ Church Southwark
William Everley Washbourn Full Age Bachelor Farmer Caterham Surrey Richard Washbourn Farmer
Susan Ann Hawk Full Age Spinster 26 Stamford Street Joseph Hawk Decorator
By licence, both signed
Witnesses Joseph Hawk, Martha Gardener, Mary Ann Palmer, Jackson Barwise? and Mary Ann Dadd?
1841 census HO107 1077/9 folio 9
Tillingdown Tandridge Surrey
Richd Washbourn 44 Farmer not born Surrey
William Washbourn 20 Farmer not born Surrey
Susan Washbourn 20 Not born Surrey
On the 1851 census in Caterham Richard gave his birthplace as Gatesbury Wiltshire. As William emigrated to New Zealand the 1841 census is the only evidence for his place of birth which wasn't Surrey if the census was correct.
Richard seems to have been buried at St Lawrence Oldbury On the Hill Gloucestershire - 24th April 1858 aged 81.
William's New Zealand death certificate should give his mother's name.
Regards
Valda