Statistics for occurrence #1 of “Brigadier-general D. Butterfield” in chapter 6 of Comte de Paris, History of the Civil War in America. Vol. 3.:

...unately, both parties continued to employ the forms adopted in the old army of the United States, which render comparisons easy. Commander-in-Chief, Major-General J. Hooker. Chief of Staff, Brigadier-general D. Butterfield . 1st brigade, Col. Phelps—22d, 23d, 24th, 84th N. Y. 2d Brigade, Brig.-gen. Cutler—7th Ind., 76th, 95th, 147th N. Y., 56th Pa. 3d Brigade, Brig.-gen. Paul—22d, 29...
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