For the six major subdivisions mentioned above the total baptisms at Solano and San Rafael were 264. If this number represents 15 per cent, the population was 1,760, a value not basically different from the arbitrary figure derived from the village lists. An intermediate estimate, 1,800, will be taken for the population of the Lake Miwok and Northern Wappo. For the Central Wappo there is a paucity of ethnographic data. Furthermore the territory itself is very circumscribed, since Pope Valley has been allocated for present purposes to the Northern Wappo and embraces little more than the flat land within a radius of a few miles from the modern town of Calistoga. Merriam cites only one name (in the manuscript entitled "Yukean"), viz., _Mi-yahk-ma_. Barrett (1908, p. 269) gives _Maiyakma_, together with _Nilektsonoma_ and _Tselmenan_, which were close by. In addition he lists _Mitustul_, five miles to the west of Calistoga. It seems likely that we have here a single small division, or tribelet, with the "capital" at Maiyakma and with three smaller, peripheral villages. If we use the same population estimates as we did farther north, we may ascribe 200 persons to Maiyakma and 100 each to the others, making 500 in all. The mission records supply two items of interest. The first is a note from Sonoma that there were baptized 103 persons from Mayacma "o Tamalsimas." The latter name is probably a corruption of the term written by Barrett as Tselmenan, and indicates that this village was then in existence. The other item is from San Rafael which reported 9 baptisms from Teluasuenhuca "o Tamalsimela." The total then is 112. The baptism factor of 15 per cent cannot be used here with confidence because the upper Napa Valley was much more accessible to the San Rafael Mission and particularly the Sonoma Mission than was the area around and above Middletown. At the same time the distance and difficulty of approach were somewhat greater than in the case of the lower Russian River Valley near Santa Rosa and Sebastopol, for which the baptism factor was taken as one-third. As a compromise we may take a factor of one-quarter, or 25 per cent. This yields an estimated population of 450, a figure which appears not unreasonable.