William James Sidis and his Browning - HUB History: Boston history

Sidis selfie with his Brownie (source)

William James Sidis - Geniuses

Bio of William Sidis

History: Supposedly the Smartest Man in the World Ever!, M.M. Montoya

William James Sidis: Smartest Man Alive to Social Reject

The Amazing Story of Genius William James Sidis - HubPages

Bedouins Project Gutenberg

After America by Paul Starobin - Audiobook

William James Sidis: the Tragic Story of the Smartest Person Ever Lived - Learning Mind

The Amazing Story of Genius William James Sidis - HubPages

William James Sidis (1898-1944) - Mémorial Find a Grave

Boston Herald, May 4,1919

William James Sidis (1898-1944) - Mémorial Find a Grave

Bedouins Project Gutenberg

William James Sidis - Geniuses