The workable belt, generally speaking, forms a horizontal section about half-way up the side of the mountain. Below it, both on the exterior and within the crater, are banks of detritus, and on these statues have been set up; most of them are still in place, but they have been buried in greater or less degree by the descent of earth from above (fig. 57). Mr. Ritchie made a survey of the mountain with the adjacent coast, but it was found impossible to record the results of our work without some sort of plan or diagram which was large enough to show every individual image. This was accomplished by first studying each quarry, note-book in hand, and then, with the aid of field glasses, amalgamating the results from below; the standing statues being inserted in their relation to the quarries above. It was a lengthy but enjoyable undertaking. Part of the diagram of the exterior has been redrawn with the help of photographs (fig. 60); the plan of the inside of the crater is shown in what is practically its original form (fig. 47). _Quarries of Rano Raraku._—Leaving on one side for the moment the figures on the lower slope, let us in imagination scramble up the grassy side, a steep climb of some one or two hundred feet to where the rock has been hewn away into a series of chambers and ledges. Here images lie by the score in all stages of evolution, just as they were left when, for some unknown reason, the workmen laid down their tools for the last time and the busy scene was still. Here, as elsewhere, the wonder of the place can only be appreciated as the eye becomes trained to see. In the majority of cases the statues still form part of the rock, and are frequently covered with lichen or overgrown with grass and ferns; and even in the illustrations, for which prominent figures have naturally been chosen, the reader may find that he has to look more than once in order to recognise the form. A conspicuous one first strikes the beholder: as he gazes, he finds with surprise that the walls on either hand are themselves being wrought into figures, and that, resting in a niche above him, is another giant; he looks down, and realises with a start that his foot is resting on a mighty face. To the end of our visit we occasionally found a figure which had escaped observation. [Illustration: Fig. 48. DIAGRAM OF RANO RARAKU. ]