Dear Sandy,
You are certainly on to the right Elizabeth. I have that marriage, but it was only discovered for me by a kind English friend at the Records Office, It took a bit of work for him so you are amazing to have dug it up.
To the point.
Robert died in 1887 and his death place was close to his offspring, away from Plumstead
I think death in Woolwich is very likely her, especially with the birth date tallying so well. So, just after the census.
No I have no evidence of her beyond 1881, only the family story. I think it may have been another of those 'larger than life' tales.
Thank you for your work. I shall send for the certificate and settle the matter . Sue