The first line relates to an Elisabeth Brown, Step Dau, aged 17
The second line is John Brown, step son, aged 13
The third line is Jean Brown, step dau, aged 8
This is a particularly taxing family, as their mother on this census is Elisabeth McArthur, previously Clarkson, but must also be a Brown somewhere in the past to have these children. I believe John brown to be illegitimate so no father mentioned, and I cant place the other two. I had a Lilybank in Port Glasgow, but now realise there is a Lilybank in Glasgow itself.