When was John Gardner Coolidge's aunt born?
John Gardner Coolidge: John Gardner Coolidge (July 4, 1863 – February 28, 1936) was an American collector, diplomat, author, and nephew of Isabella Stewart Gardner. Isabella Stewart Gardner: Isabella Stewart Gardner (April 14, 1840 – July 17, 1924) was a leading American art collector, philanthropist, and patron of the arts.
April 14, 1840