MAJOR ANDERSON'S COMMAND
AT FORT SUMTER.

Captain Truman Seymour belongs to Major Anderson's regiment, the First Artillery. He is a native of Vermont, and was appointed from that State to his present regiment on 1st July, 1846. He served throughout the Mexican war, and distinguished himself by his gallantry in so marked a manner that, on 20th August, 1847, he was breveted Captain. He is not only an excellent soldier and a prudent officer, but is an accomplished scholar and artist.

First-Lieutenant George W. Snyder, of New York, whose commission dates from 1st July, 1856.

Another officer of the First Regiment of Artillery, serving in Fort Sumter, is First-Lieutenant Jefferson C. Davis, of Indiana. He entered the army, as Second-Lieutenant in his present regiment on 17th June, 1848.

Richard K. Meade, Jun., of Virginia, who was appointed from that State on 1st July 1857. He is a Second-Lieutenant.

First-Lieutenant Theodore Talbot, of Kentucky, who was appointed Second-Lieutenant in [the First Regiment of Artillery] on 22d May, 1847.

Captain Abner Doubleday also belongs to the First Regiment of Artillery. He hails from New York, and entered the army, as Second-Lieutenant in the Third Artillery, on 1st July, 1842.

Of the Commander, Major Anderson, we published a portrait and biographical sketch in No. 211, of Harper's Weekly, and refer our readers to that number.

Assistant-Surgeon Wylie Crawford, of the United States Medical Staff, at present the senior officer of Major Anderson's Staff, and medical officer of Fort Sumter, is a native of Philadelphia. Dr. Crawford is a son of the Rev. Dr. Crawford, so long and so favorably known in his connection with the University of Pennsylvania. Dr. Crawford entered the army in 1851, at the head of his class, and has since that period been actively engaged in distant frontier service in Texas, New Mexico, and Nebraska. In 1857 Dr. Crawford traveled through Mexico, with his own conveyance and servants, and ascended successfully the Popocatapetl, carrying a barometer to its top. He spent a night in the crater, which he thoroughly explored; and for his daring exploration was honored with membership by the Geographical Society of Mexico. He was made bearer of dispatches by Mr. Forsyth to the State Department. In September last Dr. Crawford was assigned to duty with the First Regiment of Artillery at Fort Moultrie, and was one of the last to leave that work on the night of 26th December. The entire hospital department was crossed under his direction on the 27th; it was hardly completed when Fort Moultrie was occupied by State troops.

Of the Chief-Engineer, Captain Foster, we published a portrait and biographical sketch in No. 215 of Harper's Weekly, and refer our readers to that number.