Rongorongo, the writing of Easter Island, has evoked great scientific interest since its discovery. From the numerous inscribed artifacts observed by Eyraud in 1864 (Englert 1948:315), only a few survive.
"Allographic Variations and Statistical Analysis of the Rongorongo Script,"
Rapa Nui Journal: Journal of the Easter Island Foundation: Vol. 19
, Article 6.
Available at: https://kahualike.manoa.hawaii.edu/rnj/vol19/iss2/6