The following parishes records have been searched without finding any STERRYS

Hunsdon (Baptisms, Marriages & Burials 1546-1837)
Little Hadham (Baptisms, Marriages & Burials 1559-1812)
St Albans Abbey (Baptisms, Marriages & Burials 1596-1812)

The following parishes have been searched and have located STERRYS or similar:

Eastwick
There is one IGI marriage entry:
1599 Oct 15 Sara Starye and Nycolas Browne

Hertford
Burials

The NBI 2nd edition has the following burial for Hertford (Quaker Monthly):
1809 May 10 Mary Sterry, aged 73

Note: There were no Sterrys in the 1851 census for Royston.

Society of Friends Marriages (Hertfordshire) 1790-1820
Materials donated anonymously by a private individal in 1996 to the Society of Genealogists, London:
Hertfordshire Marriages (including Quakers)
##1820 May 10 Richard Sterry, son of Benjamin & Sarah, of Southwark & Ann Pollard, daughter of Joseph & Sarah of Hertford. at Hertford.

Legend:

## = Southwark, Surrey, UK line