1838, being second in a class of forty-five, and on July 7th of the same year was appointed Second Lieutenant in the United States Engineers. Generals Hardee, Wayne, Ed. Johnson, Reynolds, Stevenson, Trapier, and Sibley, of the Confederate army, and Mc-Dowell, A. T. Smith, Granger, Barney, and McKinstry, of the Federal army, were classmates of his, and were graduated at the same time.
His life was uneventful from that date to the year 1846-47, when, according to plans drawn up by Captain J. G. Barnard, U. S. Engineers, and himself, he directed the fortification works at the city of Tampico.
In the month of March, 1847, he joined the expedition under Major-General Scott, against the city of Mexico.
He distinguished himself at the siege of Vera Cruz, in several bold reconnoissances before the battle of Cerro Gordo, and also in most of the engagements in the valley of Mexico.
The strongest proof of his merit—one that gave a forecast of his great strategic and engineering powers—