Hi Les
I have traced the Shadwell Robert Buswell in the 1861 and 1871 censuses and I do not think that he is your ancestor:
1861 RG 9/280 23 p21 (St George in the East, St Paul) living with his parents and brother John
Robert Buswell 20 Druggist's Porter b Middlesex, Shadwell
1871 RG 10/532 49 p35 (St George in the East)
Robert Busswell Head M 30 Druggist Assistan b. Shadwell, Middlesex
Elizabeth do Wife M 25 - b. St George E
Arthur ? do son 4 - b. do
Elizabeth ? do daur 2 - b. do
Freebmd has the following index entries:
Marriages Apr-Jun 1865 Buswell Robert William Shoreditch 1c 477
(probable bride Brown Elizabeth Euphemia)
Births Jan-Mar 1867 Busswell Arthur Robert St Geo East 1c 443
Births Apr-Jun 1869 Busswell Elizabeth Catherine St Geo East 1c 381
In 1881 (RG 11/400 15 p24)
Robert Busswell, druggist assistant and his family (six children) are living at 54 Huntingdon Street, St Leonards Shoreditch.
All the best
Gobbo