He's in London in 1881!
Reference RG11, Piece 41, Folio 24, Page 6
202 Lancaster Road, Kensington, Middlesex
Hulbert, Sarah Head F 68 Lodging House Keeper
. . . .
Robertson, Percy A Lodger M 28 Clerk to Steamship Company b Liverpool
Robertson, William F Lodger M Widower 27 Mariner (unemployed) b Liverpool
a possibility from 1861?
Reference RG09, 4419, 107, 14
Victoria Road, Conchan (Onchan), Isle of Man
Whitlock, Charles Head M 46 Landed Proprietor b London
Whitlock, John E V Son M 18 Son of Officer in the Army b East Indies
Whitlock, Edward V Son M 12 Scholar b East Indies
Wilson, Ellen F Ward 14 Scholar b East Indies
Robertson, William Visitor M 7 Scholar b Liverpool
+ servants