Hi Sue
Non of the 1861 census indexes show William sen or junior as being in or around West Kirby/Grange area, my guess is that they have been missed by the enumerator/transcriber for some reason. I have my own copy of the Cheshire 1861 and have searched every page and not found them, I did notice that there was no "pub" shown in Grange so I checked the Whites 1860 directory and this shows William Powell as victular of the Chesnut Horse, so why he was missed I can't imagine.
From the 1860 directory
Grange is a small township in the Lower Division, of the Wirral Hundred, 8.5 miles N. from Great Neston, contains 850 acres of land, and in 1851 had 19 houses and 105 inhabitants, of whom 50 were males and 49 females. Rateable value £1,044 12s. The village of Grange is sometimes called Little Caldy. John Shaw Leigh, Esq., is the principal landowner and lord of the manor, The trustees of Bennett,'s charity own 242 acres in this township.
DIRECTORY.—William Peers, blacksmith; William Powell,victualler, Chesnut Horse; Priscilla Boberts, shopkeeper; and Anthony Averill New House, Henry Brown, The HALL> George Mutch, William Rainford, and Leonard Ray, Farmers.
The rest of the family in the 1861/1871 is shown below.
1861 RG9-2638-F57 West Kirby
John and Elizabeth Wood Merchants + 10 servants and family
Esther Powell 38 laundress West Kirby
1861 RG9-2638-F52 West Kirby
Thomas Powell head 47 ag labourer W K
Hannah wife 37 Brimstage
Esther daug 13 W K
George son 10
James 8
Elizabeth daug 5
1871 RG10- 3743-F66 Black Horse Grange
William Powell head 53 Innkeeper and farmer W K
Ellen wife 45 Woodchurch
Sarah daug 18 W K
John son 15
Charles 4 Grange
1871 RG10-3743-F63 West Kirby
Thomas Powell head 55 farmer 23 acres W K
Hannah wife 45 Brimstage
George son 20 lab at home W K
James 18 ~
Elizabeth daug 14 at home
Thomas son 7 scholar
1891 RG12-2876-F20 Lang Lane West Kirby
Thomas Powell head 75 farmer W K
Hannah wife 45 Brimstage
Thomas son 26 farn serv W K
1891 I think George is in Wavertree Liverpool ?
1891 RG12-2876-F96 Deva Road West Kirby
James Powell head 38 coal dealer W K
Kate wife 31 Wolverhampton
Eva daug 4 W K
Stanley son 3 W K
1891 RG12-2876-F72 Birkett Road West Kirby
Charles W Powell head unwed 24 lab coal Grange
Ellen mother 67 living on own means Woodchurch
if there is anything else you need please ask
peterbennett