Primary Source
Letter from Gertrude McCurdy Hubbard to Alexander Graham Bell and Mabel Hubbard Bell, September 1, 1877
Author: Kelvin, William Thomson, Baron - Hubbard, Gertrude McCurdy - Bell, Alexander Graham - Thomson, William, Baron Kelvin - Bell, Mabel Hubbard
Source: Library of Congress
Collection: Alexander Graham Bell Family Papers at the Library of Congress
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