Dall, referring to 1866-67 (Contr. Am. Ethn., I, 23, 39), estimated the number of the Yukon Eskimo at 1,000 and that of the Yukon and Koyukuk Indians, from the mouth of the Tanana downward, at 2,800. Only a few sites of villages are incidentally given by Dall. Ivan Petrof, as a special agent for Alaska of the United States Census for 1880, reports himself the following Indian settlements and numbers of inhabitants on the Yukon (Compil. Narrat. Expl. Alaska, 68; gives also data on Eskimo, but his arrangement and unidentifiable localities prevent these data from being used here): Anvik station and village 94 Single house 20 Single house 12 Single house 15 Tanakhothaiak 52 Single house 15 Chageluk settlements 150 Khatnotoutze 115 Kaiakak 124 Kaltag 45 Nulato, station and village 163 Koyukuk settlements 150 Terentiefs station 15 Big Mountain 100 Single house 10 Sakatalan 25 Yukokakat 6 Melozikakat 30 Mentokakat 20 Soonkakat 12 Medvednaia 15 Novo-kakat 106 Kozmas 11 Nuklukaiet 27 Rampart village 110 Fort Yukon 82 Later demographic records on the Yukon and its tributaries and on the coast comprise additional data by Petrof, published as a part of the Eleventh (1890) United States Census and arranged by districts and linguistic groups; and the data of three subsequent United States Censuses, 1900, 1910, and 1920, which are given in differing ways, but in the main by major ethnic and territorial or jurisdictional subdivisions. Due to incomplete enumerations; to the use of native estimates for actual count (as seems to have been the case with Dall's figures, as well as others); the different methods and classifications employed; and the inclusion of units now into one and now into another group (as with Petrof, who includes three Indian villages below Anvik among the Eskimo, etc.), the various counts are not comparable and give but hazy ideas of the true conditions. Yet they are not without value, particularly in showing the earlier population of the villages and the relative proportion of the sexes and ages. The more helpful details are given in the appendix; for still others see references in bibliography. FOOTNOTES: [23] See also Petrof (Ivan), Tenth Census Rep., Wash., 1880, VIII, 37; but his transliteration of names is not always correct. [24] This doubtless included many subadults. [25] 31 per cent, or 1 in 3.2. PRESENT CONDITIONS