Who were Margaret Wood's parents and what was their date of birth?
Do you happen to know the names of any siblings (of her father John) who would qualify to be the father of this John S. Grey (sometimes alternately spelled in records as Gray)?
Did Sarah Jane ever marry (if so, what was her surname) and is it possible she also visited in the US with the new surname?
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Neither Margaret or Sarah Jane Wood ever married and died as spinsters back in Sunderland.
Margaret b May 9 1885 d May 27 1975
Sarah Jane b April 17 1883 d Mar 1953
Parents:-
John Wood b Oct 14 1843 d Apr 12 1926
Mary Eleanor Renton b Jul 1843 d Dec 30 1920
None of their siblings married anyone by the name of Grey/Gray and I have details of the siblings families.
The only thing I can think is that the two sisters often used the home address of a cousin in the UK surname of Heward. The only Frances Heward I can link to the tree was married locally.
As it happens also in 1921 Sarah Jane's sister Margaret is named on a ship (Aquitania) manifest dated April 23 1921 - one of the cousin's children Jeannie White HEWARD aged 16 at the time is shown as visiting Margaret Wood at 136, East 60th Street (C Egan - I believe is the permanent resident at that address)
Jeannie White Heward returned to Hetton-le-Hole near Sunderland where she was married a number of times.