Note I'-2 — Chapter I · ITINERARY: THROUGH NEW MEXICO ON THE RIO GRANDE TO EL PASO, FEB. 27TH-MAR. 21ST, 1807.

Soon after leaving Conejos the party crossed Rio San Antonio, or San Antonio cr. (the main branch of Rio Conejos), below the confluence of Los Pinos cr., past places of both these names, and at lat. 37° N. went from the present State of Colorado into the present Territory of New Mexico. This river heads E. of the Tierra Amarilla, in the mountain range of which Brazos Peak, over 11,000 feet, is a conspicuous elevation. The most notable feature of the day is Cerro San Antonio, nearly 11,000 feet high, standing out from the range. They skirted its E. base, among the hills of which Pike speaks, between it and the Buffalo buttes, as the D. and R. G. R. R. now does, and where is the station Volcano. S. W. of the peak are the Ortiz hills. Camp was set at or near the present station Tres Piedras (Three Rocks).