Lincoln and Music

[Eva Elisabeth]

Where does the quote/statement origin? Does Hertz give a source? I doubt Abraham Lincoln could play an instrument - why would he have asked Lamon and others to play for him so often? Also this would be way more "commonly known" if true IMO.
I also wonder (and rather doubt although it would be cool) if this alleged letter to the Hohner company indeed exists/existed.
http://harp-l.org/pipermail/harp-l/2009-...00551.html