"Letter from Mabel Hubbard Bell, February 27, 1880."Library of Congress, Alexander Graham Bell Family Papers. Retrieved: April 5, 2009. Note (N.B.): The last line of the typed note refers to the future disposition of award funds: "... and thus the matter lay till the paper turned up. He intends putting the full amount into his Laboratory and Library".
"Honors to Professor Bell."Boston Daily Evening Traveller, September 1, 1880, Library of Congress, Alexander Graham Bell Family Papers. Retrieved: April 5, 2009.