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Rh Mexico from the North. In that case the most natural route to take was the one which General Taylor selected. It entered a pass in the Sierra Madre Mountains, at Monterey, through which the main road runs to the City of Mexico. Monterey itself was a good point to hold, even if the line of the Rio Grande covered all the territory we desired to occupy at that time. It is built on a plain two thousand feet above tide water, where the air is bracing and the situation healthy.

On the th of August the army started for Monterey, leaving a small garrison at Matamoras. The troops, with the exception of the artillery, cavalry, and the brigade to which I belonged, were moved up the river to Camargo on steamers. As there were but two or three of these, the boats had to make a number of trips before the last of the troops were up. Those who marched did so by the south side of the river. Lieutenant-Colonel Garland, of the th infantry, was the brigade commander, and on this occasion commanded the entire marching force. One day out convinced him that marching by day in that latitude, in the month of August, was not a beneficial sanitary measure, particularly for Northern men. The order of marching was changed and night marches were substituted with the best results.

When Camargo was reached, we found a city of