As indicated by the caption, this image shows Clarence Mackay with his daughters, Ellin and Katherine in the Mackay mansion's second library which had formerly served as the billiard room.
The caption accompanying this photograph reads as follows:
CIRCA 1906: Clarence Mackay with his daughters, Ellin and Katherine in Harbor Hill's second library which had formerly served as the billiard room. He is seated in a reused billiard room chair. Behind him atop the hastily improvised glazed bookcases, are the mantle clock and candelabra originally in the dining room, To the right is a two-tiered table that Allard had supplied for the first library.
See Harbor Hill, Clarence Hungerford Mackay's Mansion.
