There is no doubt that among the Egyptians and several of the peoples of the eastern hemisphere, ancient and modern, the form of the cross was used symbolically, and there is no more doubt that it was employed in a similar manner by many American tribes with reference to the points of the compass, or rather the four winds. It was also used with many differing significations. See in this paper Figure 60, page 158, Figure 143, page 220, Figure 154, page 230, Figure 165, page 238, and Figure 168, page 240. The ease with which the design was made would tend to its early adoption as a sign, an emblem, or a symbol. Rev. S. D. Hinman states that among the Dakota, symbolic crosses always have the members equal, or of the “Greek” pattern, and are always worn resting on one foot, not two as in the St. Andrew’s cross. They represent the four winds issuing from the four caverns in which the souls of men existed before embodiment. The top of the cross is the cold, all-conquering giant, the north wind. As worn on the body it is nearest the head, the seat of intelligence. The top arm, covering the heart, is the east wind, coming from the seat of life and love. The foot is the burning south wind, indicating as it is worn the seat of passion and fiery lust. The right is the gentle west wind, blowing from the spirit land, covering the lungs, from which at last the breath goes out. The center of the cross is the earth and man, sometimes indicated at that point by a circle surrounding a dot. On the upper arm an arrow is sometimes drawn, on the left a heart, on the right a star, and on the lower a sun. SUGGESTIONS TO COLLABORATORS. The present writer hopes to receive contributions from travelers and observers, not only in North America, but in other parts of the world. Such collaboration will always receive due credit, and when practicable will be reproduced in the language of the collaborator. The number and the importance of the contributions received upon the collateral branch of sign-language encourages the hope of similar success in this application for assistance in the monograph on pictographs now in preparation. The main object of the classification both of the text and of the illustrations in the present paper has been to stimulate the research and assist the collaboration invited, so that reference to the various preceding headings is unnecessary. Some practical suggestions may, however, be offered as follows: