Nightly News | April 24, 2013
>>> and the smithsonian announced an astounding discovery. they have discovered the recorded voice heard for the first time of alexander graham bell on a wax and cardboard disk dated april 15 , 1825 , 20 years to the day after the death of lincoln.
>> alexander graham bell .
>> what that was there, hear my voice, alexander graham bell . the disk was first discovered by an indiana university sound historian.