The missions which thus represented a slight and temporary revival of the old spirit of enterprise, were those of San Rafael Arcangel and San Francisco Solano. The former, located near Mount Tamalpais, between San Francisco de Assis and the Russian military station at Fort Ross, dates from the 17th December, 1817; the latter, situated still further north, in the Sonoma Valley, from the 4th July, 1823. Some little uncertainty exists as to the true reasons and purposes of their foundation. The commonly accepted version of the story connects them directly with problems which arose out of the course of affairs at San Francisco. In 1817 a most serious epidemic caused great mortality among the Indians there; a panic seemed inevitable; and on the advice of Lieutenant Sola, a number of the sick neophytes were removed by the padres to the other side of the bay. The change of climate proved highly beneficial; the region of Mount Tamalpais was found singularly attractive; and a decision to start a branch establishment, or asistencia, of the mission at San Francisco was a natural result. The patronage of San Rafael was selected in the hope that, as the name itself expresses the "healing of God," that "most glorious prince" might be induced to care "for bodies as well as souls." While considerable success attended this new venture, the condition of things at San Francisco, on the other hand, continued anything but satisfactory; and a proposal based on these two facts was presently made, that the old mission should be removed entirely from the peninsula, and refounded in a more favorable locality somewhere in the healthy and fertile country beyond San Rafael. It was thus that the name of San Francisco got attached from the outset to the new settlement at Sonoma; and when later on (the old mission being left in its place) this was made into an independent mission, the name was retained, though the dedication was transferred, appropriately enough, from St. Francis of Assisi to that other St. Francis who figures in the records as "the great apostle of the Indies."