In the 1881 census 13 Haviland Terrace, Defoe Road, Tooting Graveney, London.
Head John Parker, age 28, nurseryman, Hackney, Middlesex.
Wife Florence A. Parker, age 22, born Hackney. Brother? in Law Ernest J. Parker, unmarried, age 23, artist, born Hackney.
[Could Florence have provided the information and Ernest is her Brother in law?.
Also in the next house is another family of Parkers probably John’s parents and sister.]

In the 1891 census 4 Beechholme Road, Hackney, London.
Head John Parker, age 38, tram conductor, born Hackney, London.
Wife Florence A. Parker, age 31, born Hackney.
Son Horace Parker, age 9, born Buxton, London.
Daughter Florence E. Parker, age 8, born Buxton.
Daughter Winifred E. Parker, age 5, born Buxton.
Son Leonard Parker, age 3, born London.

In the 1901 census Wandsworth civil parish, St Andrews ecclesiastical parish, Wandsworth, London, Earlsfield Rd.
John Parker, head, married, age 46, Guardsman [difficult to read], born St. John’s Wood, London.
Wife Florence A, Parker, age 39, born Dalston, London.
Son Horace V. Parker, single, age 19, ??? Clerk (Junr), born Tooting, London.
Daughter Florence E. Parker, single, age 18, drapers assistant, born Tooting.
Daughter Winnifred E. Parker, age 15, born Brixton London.
Son Leonard Parker, age 13, born Brixton.
Visitor John Chapman, widower, age 78, born Darlston.