Direct area comparisons between the territory here concerned and that held by the Pomo and the Coast Miwok can lead to only very tentative conclusions. If we use the region delineated by Barrett (1908) on his large-scale map, the peoples mentioned above occupied approximately 950 square miles of land surface. The density of population was reckoned for the Pomo at 8.0 per square mile and that for the Coast Miwok, with a population estimated at 3,000, comes to 3.4. The equivalent estimates for the Wappo and Lake Miwok would be respectively 7,600 and 3,260. There are no grounds for immediate decision whether either is too high or too low. Consideration of the character of the terrain is not very helpful since the Wappo-Lake Miwok habitat resembled that of the Pomo in some respects and that of the Coast Miwok in others. We must therefore turn to other devices. In contrast to the Coast Miwok the Lake Miwok and the Wappo have been the subjects of ethnographic studies of direct value to the population problem, particularly those of Barrett (1908) and of Driver (1936). In considering these data, and also those furnished by the mission records, it will be desirable to split the region into six small areas along the lines indicated by the map given by Kroeber in the Handbook (1925, pl. 27, opp. p. 172). Hence we have (1) the Lake Miwok, (2) the Western Wappo, (3) the Northern Wappo, (4) the Central Wappo, (5) the Southern Wappo, and (6) the Wintun of Napa Valley. As a starting point we may select the Western Wappo. The names and the location of the villages differ widely as presented by the three investigators of the area. The confusion is rendered even more profound because Barrett in his terminology takes account of the Pomo occupancy of Alexander Valley in the early years of the nineteenth century, whereas Merriam and Driver ignore, not only the presence of the Pomo, but also the names applied by them to settlements. On the other hand, Driver's study is the most thorough of them all and for this reason alone may well serve as the basis for consideration of population. Driver lists (1936, pp. 183-184) 10 places which he calls "permanent towns." Of these, one is located outside Alexander Valley and hence may be disregarded; two are cited as of "unknown" location and thus had better be disregarded also. There remain seven, all of which Driver places on his map (p. 182). They are set forth below, together with the names given by Merriam and Barrett which cannot be reconciled with those of Driver. _Kotico-mota_ (Driver). Koticomota is mentioned by Barrett (1908. p. 271) as having been taken from the Pomo by the Wappo and occupied by them. Probably the largest town in Alexander Valley. _Nets-tul_ (Driver). This village is not mentioned by Barrett under this name, although it is located near Barrett's Cimela and Koloko. Its existence, however is confirmed by Merriam who calls it Net-tool.