(1805-80) Graduated in the West Point class of 1826. He won a brevet for gallantry in the Mexican War and one for his services in the Southwest, especially at Fort Yuma, California, on the Colorado River. He was promoted to rank of brigadier general on May 17, 1861, and wounded during the first battle of Bull Run. He commanded the 3rd Corps at Yorktown, and at Seven Pines he was commended for his personal gallantry in rallying the retiring Union troops. He also served in the 7 Days battles and at 2nd Bull Run. He spent the latter part of the war in command of portions of the Washington defenses and on court martial duty.

Wet plate, albumen carte de visite photograph, mounted to 2 3/8 x 4 card. Seated view posing with his hand inside of his general's uniform coat. Maj. Gen. S.P. Heintzelman is written in period ink on the front mount. Backmark: E. & H.T. Anthony, New York, made from a photographic negative in Brady's National Portrait Gallery. Period ink date is written on the reverse, "May 5th, 1862." Very sharp image. Excellent.