[10] After she graduated from the Spence School, DeLamar and Evangeline Johnson, one of her schoolmates, volunteered for the Red Cross Motor Corps in Europe during World War I.
[8] Joseph Raphael De Lamar, Alice DeLamar's father, died December 1, 1918, making her the inheritor of $10 million (equivalent to $202,566,372 in 2023)[8][11] and was subsequently called the richest bachelor girl in the United States.
[6] DeLamar was a patron of the arts and supported the careers of architects, artists, choreographers and writers, but she often preferred to remain anonymous when making financial donations.
[13][14] Her visitors included Dave Brubeck, Laura Ingalls Wilder, Salvador Dalí, Eva Le Gallienne, and George Balanchine.
[citation needed] She also had a house in Palm Beach, Florida along the ocean; a townhouse in Paris that was previously owned by Gerald Murphy; and an apartment at 530 Park Avenue in New York.
[16] She backed plays[3] and she is believed to have provided funding for the Civic Repertory Theatre established by Le Gallienne in New York City.
[17] While seeking treatment for liver cancer, DeLamar hit her head when she fell in the South Norwalk hospital, which led to her death.