My Story of Fredericksburg
Cosmopolitan Magazine, Volume 54, 1913

Image courtesy Don Troiani Historical Artist

The standing portrait on page 149 is of course not Chamberlain. It is apparently Brig. Gen. Edwin H. Stoughton, the General who Lincoln reputedly spoke of on hearing of his capture saying, "I can make a brigadier-general in five minutes, but it is not easy to replace a hundred and ten horses"1 or "I can make a much better Brigadier in five minutes, but the horses cost a hundred and twenty-five dollars apiece."2
    Trulock explains this error, "In 1984 at the National Archives, Brady Collection, the original photo was found in the Chamberlain file, the original misfiling evidently the source of the editor's mistake. The archivist recognized the photo as that of Stoughton and corrected the error of some long-ago clerk."3

This correction may have been undone in recent years as the mistake is still present at the National Archives online collection: and and it continues to cause confusion as can be seen at
1 Abraham Lincoln's stories and speeches pg 238.
2 New York Times March 11, 1863;
3 Trulock, Alice R. In the Hands of Providence pg 429.