
Sorry, TimCSS, I am not persuaded that you have joined the correct dots.
In Scotland it is quite common for children to be given surnames of a grandmother, grandfather or other relative from previous generations as a middle name even when the parents are married. It can provide useful clues for ancestor hunting.
The lodging house in Oriental Place was obviously a very respectable type of place. In fact, newspapers carried announcements of who had arrived to stay there or depart.
I think jon65 has unearthed some good information which should be given consideration. Elizabeth may well have been recorded as Eliza (my own great great grandmother was). The coincidence of the name Walesby/Whalesby is difficult to ignore.
Your latest information about Elizabeth Sophia Humphries marriage - what was her father's name and occupation on the certificate, please? Is she the Elizabeth Humphreys, servant at Forest View, Southampton in 1871? She was born in Lambeth.
Nell
Added
Why - if John Laing left John Laing Humphries well provided for in his will - did he not provide for Elizabeth in some way? Any ideas?