[1] In 1921, she also sold their country home, "Stepping Stones", in Wheatley Hills in Jericho on Long Island for $500,000 to Ormond Gerald Smith.

[14] The society pages of The New York Times scoffed at their relocation and referred to the areas as an "Amazon Enclave.

"[6] Mott transformed the home into a thirteen-room townhouse with terraced gardens that overlooked the East River.

[10] The terrace, done by Renee Prahar, featured two center pillars with ornamental monkeys holding globes of light in their hands.

[17] By January 1929, The Times changed their tune and wrote:[2] Five years ago, when Mrs. William K. Vanderbilt established her residence in Sutton Place overlooking the East River, it was little dreamed that within so short a time such a marked migration from mid-Manhattan to the East River district would occur as is now in full swing.

In the unbroken line of new apartments, lining Fifty-seventh Street almost solidly from Second Avenue to Sutton Place, those who doubted the wisdom of Mrs. Vanderbilt's move have found a convincing answer to their conjectures as to the ultimate success of the Sutton Place movement.

Before his death, she had two daughters by Rutherford: On April 29, 1903, she married her third husband, William Kissam Vanderbilt (1849–1920), in London.