Following Elbert's attempt at dating Polynesian migration, it was Kenneth P. Emory who was finally able to map the migratory routes from West Polynesia (which he designated as Samoa and Tonga) to East Polynesia (Tahiti, the Marquesas, Easter Island, New Zealand, Mangareva and Hawaii.), as well as establish the rough chronology of these migratory events, and their origins \cite{Emory1963}. Emory, through his previous work and experience recognised the languages of Polynesia are very stable, and have a very similar vocabulary, because of this glottochronological dating of Polynesian languages is more accurate than languages over a continuous landmass, and while still dubious in its effectiveness and scientific rigour, could show concrete results \cite{Emory1959}.
Emory used a 100 word vocabulary list, which was a derivation of the Swadesh list with appropriate cultural substitutions (exclusion of Eurasian mammals & words without direct translations) and created reconstructions of proto-Polynesian and proto-East Polynesian to perform his analysis on. His results were stark, in both the linguistic similarity between the languages within East Polynesia and West Polynesia respectively and the comparatively large differences in language between East Polynesian and West Polynesian groups. This was more evidence that there was a long stay in West Polynesia before migration to West Polynesia began, which he estimated was at least 500 years long, but admits could be as high as 700 years. He was also able to estimate a long stay in Western Polynesia before dispersals began, and this time he estimated to be around 500 years.
He then performed pairwise comparisons between the languages of West and East Polynesia to establish a rough route of migration, which is pictured below with dates: