The Yatchikumne and, if we are to credit Schenck, the Passasimas occupied a position on the Calaveras River comparable to that occupied by the Moquelumnes on the Mokelumne. Schenck regards the Yatchikumne as a tribe equal in importance to the Moquelumnes, and the county historians speak of them as a large group. Their river frontage is equivalent to that of the Moquelumnes. For these reasons we would be justified in ascribing to the Yatchikumne and Passasimas the same population as the Moquelumnes, i.e., 3,600. The evaluation of the other two groups from the geographical standpoint is difficult, owing to the uncertainty of their location. The Siakumne may be regarded as living somewhere on the lower Calaveras and, if so, must be included with the Yatchikumne and Passasimas in the estimate for the Calaveras. The Seguamne may or may not have inhabited the banks of the Mokelumne and Calaveras rivers. In view of our ignorance on this point it may be well to omit them from consideration in this connection and leave the estimate with the existing total of 7,200. We may attempt some direct tribal comparisons. In considering the northern San Joaquin Valley and delta 21 tribes and tribelets have been examined, namely: Aguastos, Bolbones (4 tribes), Leuchas, Ochejamnes, Guaypen, Quenemsias, Chuppumne, Chupunes, Tarquines, Julpunes, Ompines, and the Cosumnes group (7 tribes). For all these the average population calculated has been very close to 700. If this figure is applied directly to the Moquelumne group, its population becomes 3,500. However, some adjustment is necessary. The Moquelumnes by all accounts, Spanish and American, were an unusually large tribe, probably reaching at least 1,500. The Yatchikumne may not have been as numerous but were apparently above the average size, let us say 1,200. The Passasimas, despite the fact that Schenck thinks they were a "group plus" may be regarded as smaller, perhaps no more than average. For the Siakumne and Seguamne we must also assume the average figure, 700. With these adjustments the total reaches 4,800. The baptism books give us a record of the following conversions. Tribe San Jose Santa Clara _____ ________ ___________ Moquelumnes 143 ... Yatchikumnes 118 ... Passasimas 145 ... Siakumne 22 ... Seguamne 47 116