The character of the lower right-hand corner was at one time as clearly cut as we represent it, some of the edges being yet clear and distinct. At the rapid of Madeira there were a number of circles similar to 15 and 16 at Ribeiráo. On a ridge of rocks in the middle of the river, just above Larges rapids, are figures, and we had only time to sketch one, Fig. 118. At Pao Grande we had a better harvest, showing evidently a later period than the former. One could easily believe these were made at the time of the Spanish conquest, the anchors, shields, and hearts being so often found in Spanish religious rites. Without doubt these were notices for navigators, as they were only out of water and seen when that passage was dangerous. Where projecting points of rock gave a face both up and down stream the same figure was on both faces. These rocks are syenitic granite and are cut to a depth of a half inch. Fig. 119 is a reproduction of the copy published. [Illustration: FIG. 119.--Petroglyphs at Pao Grande, Brazil.] Senhor Tristão de Alencar Araripe (_a_) gives a large number of descriptions with illustrations, a selection of which, with translations, is as follows: In the province of Ceará district of Inhamun, on the plantation of Carrapateira, is a small hill (or mound). On the face of one of its rocks, on the eastern side, near the edge of the road, is the inscription given in Fig. 120 painted in red. [Illustration: FIG. 120.--Petroglyph in Ceará, Brazil.] In the district of Inhamun, on the plantation of Carrapateira, in Morcego, on the top of a mound, is a semicircular stone bearing on the face toward the mound the four characters which appear in Fig. 121. [Illustration: FIG. 121.--Petroglyph in Morcego, Brazil.] In Inhamun, on the plantation of Carrapateira, in Morcego, is a large stone mound, the stones being piled up in a form of a tower; and in the inside of this tower, on the south or southwest side, are the characters given in Fig. 122 painted in bright, cochineal color. [Illustration: FIG. 122.--Petroglyphs in Morcego, Brazil.] Near the road from Cracará to Favelas, Inhamun, is a large rock, on the face of which, at the top of the western side, is the inscription [given on the upper part of Fig. 123,] all in red paint, as is also that following. [Illustration: FIG. 123.--Petroglyphs in Inhamun, Brazil.] The under part of this rock forms a shelter, and on the roof of this shelter are all the remaining characters of the figure.