In the 1880s, several tin boxes were deposited at the Smithsonian Institution containing documents and objects pertaining to Bell's work. Having already encountered patent disputes over his invention of the telephone, the contents of these boxes could serve as evidence in the event of similar disputes concerning Bell's later work. Included in these boxes were glass and wax discs which contained early recordings from Bell's Volta Laboratory. Without any playback devices deposited, however, these recordings remained silent until over 125 years later, when scientists were able to use computers to give these recordings a voice. This 1885 recording reveals a man's voice stating some names, the recording date and reciting "Mary Had a Little Lamb" twice.