Statistics for occurrence #1 of “Colonel Ely S. Parker” in chapter 2 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 10: The Armies and the Leaders.:

...ne hand thrust carelessly into his pocket, sits Lieutenant Frederick Grant, later major-general in the United States Army. In front of Grant stands Colonel M. B. Ryan, and on the extreme right sits Colonel Ely S. Parker , military secretary, who was a full-blooded Indian, a grandnephew of the famous Red Jacket, and chief of the tribes known as the six Nations. supplies at Holly Springs and compelled General Grant to...
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