This is a full page letter he wrote to me in 1991 about his work and discoveries. Quite interesting for the science collector. The item “CLYDE W TOMBAUGH HANDWRITTEN LETTER SIGNED BY ASTRONOMER WHO DISCOVERED PLUTO” is in sale since Monday, October 22, 2018. This item is in the category “Collectibles\Autographs\Space”. The seller is “peleijg0″ and is located in Hilversum. This item can be shipped worldwide.