Hi
I have just scrolled all the way through Holme on S M in 1851 - and can't see your John A. Harrison...
The only other John Harrison is aged 18...and an apprentice shoemaker living with Thomas Holliday & his family.
Do you think this could this be Hannah HOLMES ? Maybe the William Harrison is a brother of her future husband

?
Folio 18 - Skiff Lane, Rabbit Hills, Holme on Spalding Moor
Robert VOAKES Head Widow Farmer 160 acres B: Melbourne
Thomas VOAKES son mar Farmers son B: Seaton Ross
Elizabeth " wife mar "
children-
Jane, 13 Robert 10, Mary 5, Thomas 3, Hannah 1.
Hannah HOLMES serv 19 House servant B: Market Weighton
Hannah SIMMS serv 13 nurse B: South Cave
William HARRISON serv 17 farm lab Holme
George SMART serv 15 " "