OK....looked at a few censuses. 1911, Hannah is working as a servant in the
Johnson household at 41 Valley Mount Harrogate Yorks. Robert is there also, so
not married when the census was taken, working as a sweeper for the Highway Dep
and living with his parents and siblings plus a couple of lodgers.
Her mother Isabella was already a widow by 1901 and in 1911 was taking care of
the five-year old grandson Allan, as you surmised. Allan was born at Ingleby
Cross, Yorkshire, where Isabella was also born, ca 1905/6. I suspect the birth
was registered as William Allan Wright Hart (Reg yr 1905; Reg Q 3; Reg dist
Stokesley Yorks; vol 9d; pge:671) as that birth looks closest for p.o.b and
d.o.b to what I learned from the census....but I could easily be wrong. Perhaps
all the additions to his name were intended to provide a clue to his father,
but one would need the birth cert to learn more.
Alas, I am having little success trawling the indexes for the birth of
Arthur....or a marriage for Allan. How sure are you of the d.o.b for Arthur?
Regards,
Bev