The midcentury American estimates would indicate more than this number. H. W. Wessells (1859) claims 500 to 700 on the Stanislaus and Tuolumne in 1853. Adam Johnston (1853) put 1,350 on his map of the same area in 1852. W. M. Ryer vaccinated 1,010 on the two rivers in 1851. The Daily Alta California for May 31, 1851, said that the Indians were 1,000 strong between the Stanislaus and the Tuolumne, and Savage, for an earlier period, put them at 4,600 (Dixon, MS, 1875). On the other hand, it must be remembered that as a result of Spanish and Mexican, not to mention American, aggression most of the strictly San Joaquin River people had long since retreated up the lateral streams. Hence the natives seen by the commissioners between 1850 and 1853 included the residues of all the river tribes from Manteca to Merced. For the southern part of the San Joaquin Valley it was determined, in a previous discussion, that the population remainder in 1850 represented approximately one-third of the aboriginal population. Of the estimates just cited the most reliable is that of Ryer. Following the suggestions presented in the consideration of his activities, we must make a correction to account for persons who missed vaccination. Such a correction would bring the number to 1,420. Then application of the factor one-third gives an aboriginal value of 4,730. The three modes of estimate yield respectively a population of 3,800, 5,920, and 4,730, with an average of 4,817. We may use a slightly greater value and call the population 5,000. To this must be added the 1,800 persons estimated to have lived along the San Joaquin River itself. The lower San Joaquin River group as a whole, therefore, may be assigned a population of 6,800. Lower San Joaquin River Group ... 6,800 _______________________________________ NORTHERN SAN JOAQUIN VALLEY ... 27,070 ______________________________________ THE MIWOK FOOTHILL AREA Above the central valley itself and occupying the foothills from the Cosumnes to the Tuolumne lived the northern and central Miwok. This region was not reached by the Spanish expeditions nor were many, if any, of the inhabitants incorporated in the missions. It is therefore necessary to rely exclusively upon the reports of the ethnographers. In a preceding discussion of the central Miwok, who lived on the upper Stanislaus and Tuolumne, there were cited the data secured by Gifford, Kroeber, and Merriam for 70 villages. This area in 1850 was estimated to contain a population of 1,470. There are no data comparable to Gifford's for the rivers farther north, largely because the natives on the upper Cosumnes, Mokelumne, and Calaveras were thoroughly dispersed during the Gold Rush and village names and locations have become lost to the memory of Indian and white man alike. It is possible, however, to get a reasonable estimate of the population indirectly.