Hi Daisy, I could find only one Michael Kirby and one James Kirby on the census, and all William Kirby's were the wrong age.
BRISTOL, St. James 1851 Census
P.R.O. Reference # H.O. 107/1950
Part of the Parish of St James
SECTION X
Gravel Street, White Friars , Foxhill Court, Garden Alley, Deep Street, Prince Frederick Court, Harford Street, Black Friars, Pooles Court, Windsor Court.
Pages 48 + 8
Persons 434 Male 520 Female 954 Total +
Persons 81 Male 70 Female 151 Total
Enumerator John Poyer Shipp
GRAVEL STREET
60
GREEN William 50 Gardener Ireland
Martha 48 Glam:
TURNER William Lodger Widow/er 78 ? Hatter Winterbourne
PRICE Jabez Lodger Widow/er 60 Accountant Wexford Ireland
DOILE Jacob Lodger unmarried 35 Mason’s Labourer Pem: Wales
KIRBY Michael Lodger 25 Gardener Limerick
CONNER John Lodger 24 Millwright Co. Cork Ireland
HENLEY Michael Lodger 66 Shoemaker Co. Cork Ireland
Jane 50 Bath
REGAN Patrick Lodger 60 Mason Co. Cork Ireland
Elizabeth 70 Co. Cork Ireland
BRISTOL. ST AUGUSTINE, 1851 Census
CENSUS No. 7
Back of Park Street, Hanmers Buildings, Frog Lane, Warrens Court, Boars Head Yard, St Georges Buildings, Lower side of Cottage Place, Brandon Steep, Devils Alley, Brandon Place, Queens Parade, York Buildings, Court Behind, Williams Buildings, Pump Court in Lime Kiln Lane, Morgans Court in Lime Kiln Lane. 3
Pages 37
Persons 337 Male 385 Female 722 Total
Enumerator Thomas Harrill
H.O. 107/1951
22
WARRENS COURT
KIRBY James 31 Labourer Bristol St James
Ann 33 Redcliffe
Best wishes
Di xx