Interesting to note that the son Samuel Thomas Hornby was born 9 Nov 1808, but not baptised until 9 Feb 1812. Address - Union Buildings, Shoreditch.
Both parents named on the baptism record, so maybe (not definite) the father was still alive.
Union buildings is same address for baptism of Ann in Jan 1807
Union walk for baptism of Emily in 1804
Before that the family was in Southwark
Thomas 1802 baptism at St Saviour's, Southwark
Elizabeth 1799 baptism at St George the Martyr, Southwark
George William 1797 baptism at St Saviour's, Southwark
Children were NOT baptised at a non-conformist church.