1902 Kelly's Directory of Essex

P.493
DOCKRILL Robert, Parkside Villa, Hornchurch, Romford.
DOCKRELL William Robert, Sandyhook, The Esplanade, Frinton-on-Sea, Colchester.

1914 Kelly's Directory of Essex

P.762
DOCKRELL William Robt., Sandy Hook, The Esplanade, Frinton-on-Sea.

1915 Kelly's Directory of Sussex

P.177 Brighton and Hove
DOCKRELL Ernst. 163 Sackville road, Hove.