He’s not the only American General buried in two places. Stonewall Jackson is buried at VMI. His arm is buried near where it was amputated, complete, I believe, with casket and headstone.
Good pickup. There probably are others. It wasn’t uncommon to bury the dead on or near the battlefield. Important personages, like general officers, might have a portion of their body (like their heart) preserved for a trip to the family plot.
It also occurs to me that General Dan Sickle’s leg, amputated by a Confederate cannonshot at Gettysburg, is at the Smithsonian Institute. Does that count?
Stonewall Jackson’s Left Arm at Chancellorsville
http://www.historynet.com/visiting-stonewall-jacksons-left-arm-at-chancellorsville.htm