- Digital Commonwealth
- Perkins School for the Blind
Two girls standing behind a table with two grooved, wooden rods and a frame in front of them. The girls hold their hands in front of them, one with palms up and the other with palms down. Imperial Royal Institute for the Education of the Blind, Vienna. Alexander Mell.
Black and white photograph
- Samuel P. Hayes Research Library, Perkins School for the Blind, Watertown, MA. Contact host institution for more information.