As indicated by the caption, this image shows the Mackay mansion's butler's den.
The caption accompanying this photograph reads as follows:
The butler's den. On the left, notice a cast-off rattan chair and whitw painted settee from the glass piazza
Obviously, the word "whitw" is a typographical error that should read "white" instead.
See Harbor Hill, Clarence Hungerford Mackay's Mansion.
