Hullo Forest Fairy,
I'm not a relative, but a member of the Manby family was a great friend of my grandmother. She was Dorrie (Dorothy) Watson, married to Walter and her mother was Fanny, born about 1860, and I believe her father Herbert H.G. Manby. I remember Fanny when I was a child in Ipswich in the 40s, and even to this day I have linen embroidered by her and given to my grandmother!
Jocasta