This account deserves comment on several grounds: with relation to Viader's visit of the previous year and the baptisms at San Francisco it is evident that whereas the southern extension of the Tarquines' habitat, whatever its size, had been swept clear prior to 1810, nevertheless the tribe persisted on the estuarine islands in truly large numbers. Moreover, since there is evidence of no more than one rancheria on the south shore, it appears that the territory in that region allotted by Schenck to the tribe is too large and should be restricted to a small area of the southeastern corner of Suisun Bay. With respect to population, Abella's figures are quite credible. It has been suggested that one of the huge houses found in this region could accommodate 9 persons without difficulty. Then the large village should have had 540 inhabitants. Allowing 24 houses for the other villages seen, 216 persons should be added, making a total of 756, a figure not far from Abella's guess of 1,000. The final reference to the tribe occurs in the diary of Duran. During the night of May 22-23, 1817, he went up the main channel of the San Joaquin, in T3N, R4E, and passed the Tauguimenes on the _left_, that is to say, on the _east_ bank. Schenck thinks that the group covered the entire strip from Pittsburg to the east bank of the main river _contemporaneously_. Now it has been pointed out as probable that the southwestern outliers were missionized, or pushed back into the swamps, as early as 1801. It is equally possible that the island communities described by Abella in 1811 were pushed, in the next five or six years, off the islands altogether and clear back eastward to the far bank of the main river. Of considerable significance is the fact that whereas both Viader and Abella mention the Tarquines as being in the estuary region, Duran, who covered this area thoroughly, is completely silent with regard to their presence. It is highly unlikely that, had there been any of the tribe left in their former habitat, he would have failed to note them. The details are very obscure but the main outlines of events in the first three decades of the nineteenth century can be perceived. Aboriginally and perhaps till nearly 1800, there was a dense population of natives extending from Port Costa along the southern shore of Suisun Bay and up the rivers for fifteen miles beyond Antioch. Among them were included tribal groups, or rancherias, called Aguastos, Chupunes, Ompines, Julpunes, and Tarquines, belonging very likely to different ethnic and linguistic stocks. Under the pressure of the Spanish military power, which was the real force behind missionization, portions of these groups were exterminated, other segments gave ground and shifted habitat, and occasional remnants persisted in the old localities. Thus each visitor in turn found a different geographical organization, until the entire native society was obliterated.