Hi
There looks to have been three children baptised to the couple at Highgate
9th January 1820
Elizabeth Hilliard
16th March 1823
William Hilliard
23rd July 1826
Samuel Hilyard
St Michael Highgate was built in 1832. Before that date Highgate was a chapelry lying partly in Pancras, Hornsey and Islington parishes but it did have a chapel of its own.
http://stmichaelhighgate.wordpress.com/history/There is a baptism 19th September 1784 (born 17th August) St Mary Hornsey of a Samuel Hilliard to parents William and Mary. Other baptisms for this couple are spelt Hildyard and Hillyard at St Mary Hornsey. Mary Hillyard was baptised 21st October 1781 but the other children (Hildyard) were all baptised in October 1793.
13th October 1793
William Hildyard - no date of birth given
Next entry in the register
18th October 1793
John and Thomas Hildyard born 17th September 17? rest of entry lost in the central spine of the register.
The marriage of Willam Hildyard and Mary Sams was at St Mary Hornsey 3rd May 1780.
There is a burial at Highgate Chapel Hornsey 1st February 1816 of a John Hildyard aged 51 of Highgate.
Other Hildyard C19th burials at the same chapel
11th September 1816
Sarah Hildyard aged 32 Highgate
13th October 1816
Sarah Hildyard aged 6 weeks Highgate
At St Mary Hornsey early C19th burials
13th November 1793
John Hildyard from Highgate in this parish aged 21 months
8th January 1804
Samuel Hillyard from Islington parish aged 20
1st December 1805
Samuel Hildyard Simpson from Islington parish aged 14 months
7th December 1806
Elizabeth Hildyard from Islington parish aged 63
1st December 1811
Samuel Hilliard from Islington parish aged 74
There are burials in both Hornsey and Highgate chapelry in the C18th of the various spellings as well as in Islington and Pancras so there might be more possible Williams baptised in these parishes.
Regards
Valda