While the present paper was in preparation, a valuable and elaborate communication was received from Dr. William H. Corbusier, assistant surgeon, United State Army, styled by him the Dakota Winter Counts, which title was adopted for the whole subject-matter, including the charts with their interpretations which had before been known to the present writer, and those from Dr. Corbusier, which furnish a different system, are distinguished by his name. It is necessary to explain that all references in the text to colors, other than black, must be understood as applicable to the originals. Other colors could not be reproduced in the plates without an expense disproportionate to the importance of the colors for significance and comprehension. A more important explanation is due on account of the necessity to omit from Dr. Corbusier’s contribution the figures of Battiste Good’s count and their interpretation. This count is in some respects the most important of all those yet made known. As set down by Battiste Good, it begins in a peculiar cyclic computation with the year A. D. 900, and in thirteen figures includes the time to A.D. 1700, all these figures being connected with legends and myths, some of which indicate European influence. From 1700-’01 to 1879-’80 a separate character for each year is given, with its interpretation, in a manner generally similar to those in the other charts. Unfortunately all of these figures are colored, either in whole or in large part, five colors being used besides black, and the drawing is so rude that without the colors it is in many cases unintelligible. The presentation at this time of so large a number of colored figures--in all one hundred and ninety-three--in addition to the other illustrations of the present paper, involved too great expense. It is hoped that this count can be so far revised, with the elimination of unessential coloration and with more precision in the outlines, as to allow of its publication. Several of its characters, with references also to its interpretation when compared with that of other counts, are given in various parts of the present paper. Where it was important to specify their coloration the heraldic scheme has been used. The pages immediately following contain the contribution of Dr. Corbusier, diminished by the extraction of the parts comprising Battiste Good’s count. Its necessary omission, as above explained, is much regretted, not only on account of its intrinsic value, but because without it the work of Dr. Corbusier does not appear to all the advantage merited by his zeal and industry. * * * * *