Died: 1913, Rock Coun­ty Wis­con­sin. There are a num­ber of Harts­horns buried in the Clin­ton Ce­me­te­ry, Clin­ton, Wis­con­sin, though not Ir­ving.

There is a re­cord at An­ces­try.com for an Ir­ving Web­ster Harts­horn (1832–1913, son of Eb­er and Lydia Harts­horn), who died Sep­tem­ber 3, 1913, Clin­ton, Wis­con­sin. It is not clear if this is the same per­son as W. Irv­ing Harts­horn (per­haps an er­ro­ne­ous trans­po­si­tion of Web­ster Ir­ving?). All pub­lished mu­sic by Harts­horn gives his name as W. Ir­ving (not Web­ster).