William A. Crafts, Life of Ulysses S. Grant: His Boyhood, Campaigns, and Services, Military and Civil.

[15] the more severe battle of Resaca de la Palma was fought, and the young lieutenant showed his quality as a soldier by his cool and persistent bravery. Those solid qualities, which in time of peace seemed to be of little account in a junior officer, began to reveal them-selves and prove their value.

The Fourth Infantry remained with General Taylor till after the capture of Monterey, and participated in all the battled of old “Rough and ready's” campaign, except that of Buena Vista. Grant's position as a cool and plucky officer was well established in his regiment, while his methodical attention to his duties were recognized by his superior officers, and led to his being placed upon the regimental staff as quartermaster. His regiment was among those detached from General Taylor's command, and sent to join the larger army under General Scott, which was to advance from Vera Cruz to the city of Mexico. His duties as regimental quartermaster, on a campaign like this into the heart of the enemy's country, were arduous and responsible, and required great tact, energy, and perseverance. They were discharged in a manner creditable to his administrative ability and his indomitable energy. But he was not satisfied with the faithful discharge of these most important duties; he desired to share in the dangers of the battle-field also, believing that “the post of danger is the post of duty.” He participated in the bloody battles of Molino del Rey and Chepultepec, and was so conspicuous for his gallantry and successful service in the latter battle, where he bravely led a gallant charge, that he received honorable mention from General Worth, and was made brevet first lieutenant,