They are not in the IOM census 1861.

There was a marriage in Birmingham 1852 between John Corkill and Harriet Jones and a marriage in Sheffield 1875 between Florence Harriet Corkill and John Fairhurst.

1881 census at 1 Burton St. Hulme.

John Fairhurst 33 Day Waiter Doncaster
Florence 25 wife Isle of Man
Harry 8 Manchester
Jessie 4 Sheffield
Fanny 3 Sheffield
Nellie 1 Manchester

It looks like a second marriage for John.

I suspect the Corkills were in Manchester since Florence was there in 1871 but I have not got the census.

Len Faragher