I don't believe I could have missed this one - I was looking for a niece of Richard, and it's Fanny's niece! Fanny Isabella Wood's sister is Susan Sophia Wood who married William Harrison June 13, 1882. That puts them in the ballpark for having a daughter born around 1884.
There's no Susan Harrison or William Harrison in the 1901 Census, so if Hilda is their daughter, she could be an orphan... There's a William Harrison living in Malew, aged 18, and guess what he does for a living?? He's a Draper's Apprentice! I would say that the circumstantial evidence is piling up, especially since Elinor Wood so casually refers to Hilda's presence in their household. But I'd much prefer some proof.
BB