Note 109 — IV. The Graphic Elements.
Reading edition
On the interpretation of these and allied signs the student should consult Garrick Mallery, Sign Language among the North American Indians, in Rep. of the Bureau of Ethnology, Vol. 1, and W. P. Clark, The Indian Sign Language (Philadelphia, 1885). It is not possible for me here to give more than the most meager details on this important topic.