Robert Crow was born in Hull in 1890, moved to East Ham before 1901 and then disappeared of the face of the earth after the 1911 UK census..until now.
I found a refence to him on the Canadian Veterans Affairs website commemorating their war dead. The reference said that Robert had emigrated to Saskatchewan. Robert didnt die but a nephew of his Harry Crow Clout died in WW11, nephew of Ellen Crow of Salter, Sask, Roberts wife I would have thought. (Harry Crow Clout had emigrated in 1924 to work as a farm labourer in Senlac)
I found a record for a Robert Crow (right age frame) in 1911 who sailed to Quebec on the 'Lake Manitoba' bound for Saskatchewan.
The next record I found was his Attestation Papers for the 53rd Battalion of the CEF signed in 1914 in Saskatoon, Sask. This is definitely the right Robert because birth date, birth place and next of kin are right.
Then I found a record for a private Robert Crow returning to Canada in 1919, his original regiment is listed as the 53rd and he was bound for Saskatoon. (Got to be him, too many coincidences)