In all these Dakota calendars there is only a single picture for each year, with nothing to mark the division of summer and winter. As they call a year a "winter," and as our year begins in the middle of winter, it is consequently impossible, without some tally date from our own records, to know in which of two consecutive years any event occurred, i.e., whether before or after New Year. In this respect the Kiowa calendars here published are much superior to those of the Dakota. OTHER TRIBAL RECORDS Clark, in his book on Indian sign-language, mentions incidentally that the Apache have similar picture histories, but gives no more definite information as concerns that tribe. He goes on to say that the Santee Sioux claim to have formerly kept a record of events by tying knots in a string, after the manner of the Peruvian quipu. By the peculiar method of tying and by means of certain marks they indicated battles and other important events, and even less remarkable occurrences, such as births, etc. He states that he saw among them a slender pole about 6 feet in length, the surface of which was completely covered with small notches, and the old Indian who had it assured him that it had been handed down from father to son for many generations, and that these notches represented the history of his tribe for more than a thousand years, going back, indeed, to the time when they lived near the ocean (_Clark, 1_).[1] In this case the markings must have been suggestive rather than definite in their interpretation, and were probably used in connection with a migration chant similar to that of the Walam Olurn. [Footnote 1: See the list of authorities cited at the end of the memoir.] THE KIOWA CALENDARS THE ANNUAL CALENDARS OF DOHÁSÄN, POLÄÑ´YI-KATÓN, SETT'AN, AND ANKO So far as known to the author, the Dakota calendars and the Kiowa calendars here reproduced are the only ones yet discovered among the prairie tribes. Dodge, writing in 1882, felt so confident that the Dakota calendar of Mallery was the only one ever produced by our Indians that he says, "I have therefore come to the conclusion that it is unique, that there is no other such calendar among Indians.... I now present it as a curiosity, the solitary effort to form a calendar ever made by the plains Indians" (_Dodge, 1_). Those obtained by the author among the Kiowa are three in number, viz: the Sett'an yearly calendar, beginning with 1833 and covering a period of sixty years; the Anko yearly calendar, beginning with 1864 and covering a period of twenty-nine years; and the Anko monthly calendar, covering a period of thirty-seven months. All these were obtained in 1892, and are brought up to that date. The discovery of the Anko calendars was an indirect result of having obtained the Sett'an calendar.