The first two boxes contained documentation for the photophone, a device to carry sound wirelessly on a light beam. The confidential materials within these boxes could serve as evidence in case of a patent fight.
In addition to indicating Alexander Graham Bell’s high regard for the Smithsonian’s role in fostering science and technology, the deposit reflected his growing sensitivity to numerous challenges to his telephone patent. On three occasions-FebruApand October 30, 1881-the Volta Laboratory Associates delivered sealed tin boxes to the Smithsonian for safekeeping.
