Investigation in place showed me that the color of series 3 consists of ocher made up with water. The very oldest drawings seem to have been made with water color, as the color has nowhere penetrated into the rock. Most of the figures are painted on overhanging rocks in such a way as to be protected as much as possible against wind and weather; whether they bear any relation to the signs on the rocks of Papua, and what that relation may be, I am not yet able to judge.
It may safely be assumed that the caves as abodes of spirits were sacred, but did not serve as places of burial. The lead rings and pieces of copper gongs found in small number before some of the caves seem to be derived from sacrifices offered to the spirits. At the present day no more sacrifices are offered there, and the islanders knew nothing of the existence of these things.
In this island carved human figures of colossal size have been frequently noticed in various publications, with and without illustrations, but apart from those statues ancient stone houses remain in which have been found large stone slabs bearing painted figures. Paymaster William J. Thompson, U. S. Navy (_a_) says of the Orongo houses, that the “smooth slabs lining the walls and ceilings were ornamented with mythological figures and rude designs painted in white, red, and black pigments.” The figures partake of the form of fish and bird-like animals, the exaggerated outlines clearly indicating mythologic beings, the type of which does not exist in nature. Fig. 135 is presented here, extracted by permission from the work above cited, and it may be of interest to know that nearly all, if not all, of the original specimens are now deposited in the U. S. National Museum.
[Illustration: FIG. 135.--Petroglyphs in Easter island.]
While the curious carvings on the wooden tablets which are discussed in the work of Paymaster Thompson are not petroglyphs, it seems proper to mention them in this connection. Fig. 136 is taken from Mittheilungen der Anthropologischen Gesellschaft, in Wien (_a_), and shows one of the tablets, which does not appear to be presented in this exact form in the work before mentioned.
[Illustration: FIG. 136.--Tablet from Easter island.]