Sorry I can't find any information on the census (1901 or 1911) for 147 Smithdown Road. And now I think I know why.
I have just found this:
http://archiver.rootsweb.ancestry.com/t ... 1007818746145 Glasstone Chas. picture frame makr
147 Winter Mrs. L'Inor costumier
147 Rooney Mrs. Emily midwife
151 Robinson Vicars watchmaker
So it looks like part of this house was just a temporary residence for unmarried women to have their children with the help of a midwife.
Interesting and it explains a few things but it's no help in tracing my ancestors.