The earth ships appear to have been an attempt by the Easter Islanders to duplicate foreign technology in the form of magic. Something similar may have happened with rongorongo. The Rapanui seem to have intuited the concept of writing, and the power of literacy that came with it, and then set about creating a system of their own. When they did so, they began entirely afresh, building it from first principles and local materials. As a consequence, it resembles no other writing system on Earth. The signs they chose come largely from items familiar to the island. Some come from animal life: fish, squid, sea turtles, crayfish, frigate birds, caterpillars. A few seem to represent plants or human figures, sitting and eating. Others are simple geometric forms: a circle, a cross, stacks of lozenges.

The glyphs of rongorongo are unique. So is the manner in which it was written and read. In fact, it was not written, but carved. Its scribes used shark’s teeth to inscribe its symbols on wooden tablets. Wood is scarce on Easter Island, and most of these inscriptions were made on pieces of driftwood. One decorated an oar. A second, a beam. A third, a statue of a bird. However, most of the surviving examples of rongorongo decorate square tablets. These appear to have been written from bottom to top, and were read following a pattern called the reverse boustrophedon. Boustrophedon is a Greek word meaning “in the manner of an ox,” and scripts written in it move like an ox plowing a field, reversing direction with each line.