​​Thor Heyerdahl (Kon-Tiki)

Led first easter island expedition in 1955
Secret Cave Stones:

Thor Heyerdahl, Aku-Aku (London, 1957)​​

"...the more recently discovered small figures in the secret caves on the island. The resemblance between nomoli and some of these figurines seems to be closer than to any of the stone figures found in other parts of West Africa. These cave figures were hidden in secret family caves and handed down from one generation to the next. 
Not only is there an amazing stylistic (and apparently functional) resemblance between these figures and nomoli, but holes in the head are common among both groups of figures"