Many thanks everone.
Carol, I have the marriage certificate you speak of, and all the census records mentioned, though in 1891, I have Sarah still living with Sarah Langshaw and her son Samuel, at 31 Penrith Street with a host of new Engelberts, an Elizabeth, Sarah and John Willis/Wylie, Hannah, David Samuel, my Grandfather, Mary Jane, and a Maud Mary.
Thanks again
Frederick