Key to tablet abbreviations in the plot (PDF version):

Tahua Tah
Aruku-Kurenga AK
Mamari Mam
Echancree Ech
Keiti Kei
Chauvet Fragment CF
Small Santiago SSnt
Great Santiago GSnt
Santiago Staff SntS
Reimiro Rei1
Small London SL
Reimiro 2 Rei2
Great Vienna GVien
Small Vienna SVien
Boomerang Boom
Great St. Petersburg GSP
Small St. Petersburg SSP
Atua-Mata-Riri AMR
Great Washington GW
Honolulu 1 H1
Honolulu 2 H2
Honolulu 3 H3
Honolulu 4 H4
Tangata Manu TM