As indicated by the caption, this image shows the Mackay mansion's housekeeper's bed-sitting room.
The caption accompanying this photograph reads as follows:
The housekeeper's bed-sitting room. Her bed sheilded behind a screen, the housekeeper had plenty of space for a comfortable office-sitting room, with plants, floers and a pet bird in her quarters
Obviously, the word "sheilded" is a typographical error that should read "shielded" instead.
See Harbor Hill, Clarence Hungerford Mackay's Mansion.