Statistics for occurrence #1 of “Capt. Sleeper” in chapter 17 of John D. Billings, The history of the Tenth Massachusetts battery of light artillery in the war of the rebellion:

...he left of the break in the line was Murphy's Brigade of the Second Division, which was driven back, and two batteries—B, First Rhode Island, Lieut. Perrin, and the Tenth Massachusetts Battery, Capt. Sleeper —fell into the hands of the enemy after having been served with marked gallantry, and losing a very large proportion of officers, men and horses. I immediately ordered Gen. Gibbon's Division...
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