The Pauper of Park Lane by William le Queux

Above the dome-shaped roof of the conservatory was a row of four long dark windows, and still above them two further storeys. On the second storey in the centre of the house was a high window covered with wire network, evidently a staircase window of stained glass.

The whole place was in darkness, as were the houses on either side, while at rear of them rose a blank wall, the back of one of the houses in Park Street. The only light showing was in the basement -- a faint glimmer behind the green holland blinds, which showed the presence of Levi in the lower regions.