This information came from the actual census records. Colkrell looks like Cockrell on the census. The writer just made a very large "C" and the trancriber took it as an "L".
In the 1871 England Census, I found:
Name Parent or spouse names Birth Year Birthplace Relation Civil parish County/Island
Richard Colkrell Helen abt 1819 London, Middlesex, England Head St. Pancras London Helen Colkrell Richard abt 1833 New Castle, Northumberland, England Wife St. Pancras London Helen Colkrell Richard, Helen abt 1858 London, Middlesex, England Daughter St. Pancras London (Sabra) Anne Colkrell Richard, Helen abt 1861 Knightsbridge, Middlesex, England Daughter St. Pancras London Margt Colkrell Richard, Helen abt 1862 Knightsbridge, Middlesex, England Daughter St. Pancras London Richard T Colkrell Richard, Helen abt 1864 Glasgow, Scotland Son St. Pancras London Alfred J Colkrell Richard, Helen abt 1866 Hull, Yorkshire, England Son St. Pancras London
Civil Parish: St. Pancras County/Island: London Ecclesiastical Parish: St. Matthew Registration District: Pancras Sub-registration District: Gray ED, institution, or vessel: 12 Household Schedule Number: 96