From http://www.ancientfaces.com/person/harry-h-clayton/47590100
Harry H Clayton's last known residence is at Tucson, Pima County, Arizona.
Obituary for his wife mentions him and his death in Tucson in 2000, see her amazing story at http://waspfinalflight.blogspot.com/2011/11/wasp-sylvia-dahmes-clayton-43-w-5-nov.html