Hi Ursula,
A William FLETCHER, base born son of Ann, a Work Woman of Tetbury, baptised at St Mary, Tetbury, 30th June 1817.
An Ann FLETCHER married Samuel BLACKWELL, Widower, at St Mary, Tetbury, 27th June 1819, by Banns.
William BLACKWELL, son of Samuel & Ann, baptised at St Mary, Tetbury, 14th November 1820.
No sign of any other children.
Victor