As indicated by the caption, this image shows the Mackay mansion stone room as it appeared circa 1920.
The caption accompanying this photograph reads as follows:
1908
Another undated image of the stone room has been placed here in the Library.
An image of the stone room in 1908 also has been placed here in the Library.
An image of the stone room circa 1924 likewise has been placed here in the Library.
See Harbor Hill, Clarence Hungerford Mackay's Mansion.