Norwegian ethnographer and adventurer (1914–2002) best known for the Kon-Tiki expedition, during which he tested the theory of early contact between South America and Polynesia by successfully sailing a raft across the Pacific Ocean. ALS, one page, 8.5 x 11, personal letterhead, February 25, 1975. Brief note to a collector. In full: “This is a sample of my handwriting to replace whatever you lost in the fire.” In fine condition, with central horizontal and vertical fold. Accompanied by one of Heyerdahl’s personal business cards. RRAuction COA.