As indicated by the caption, this image shows the fireside in the Mackay mansion's library as it appeared in 1902.
The caption accompanying this photograph reads as follows:
The fireside in Harbor Hill's original library.
There are six other photographs of the Mackay mansion library that have been placed here in the Library, the first of which can be seen here, the second one can be seen here, the third one can be seen here, the fourth one can be seen here, the fifth one can be seen here, and the sixth one can be seen here.
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See Harbor Hill, Clarence Hungerford Mackay's Mansion.