We examine the pollen analytical and 14C sequences from two Sumatra highland sites, Pea Bullok (2°15'N, 99°02'E) and Danau di-Atas (1°04'S, 100°46'E). The pollen diagrams do not correlate particularly well, possibly because two of the samples from Danau di-Atas analyzed by radioactive decay counting earlier should be infinite. Other complications are differences in the type of site, local topography, pollen sums used and difficulty in distinguishing between pollen taxa from local and regional vegetation. The older material from Pea Bullok was AMS dated.