Keywords: Channing letter page 5.jpg en William Francis Channing 1877 letter about a telephone invention to Alexander Graham Bell 1877-07-30 Library of Congress - http //www loc gov/resource/magbell 29700212 William Francis Channing other versions PD-old-70-1923 Uploaded with UploadWizard Uploaded with UploadWizard Letter from William F Channing to Alexander Graham Bell July 30 1877 |