Statistics for occurrence #1 of “Capt. M. Y. Polk” in chapter 3 of James D. Porter, Confederate Military History, a library of Confederate States Military History: Volume 7.1, Tennessee:

...on, and of Buell's loss of 3,753, the heaviest part was sustained by McCook in his combat with Cheatham. The Tennessee artillery—Bankhead's battery, Capt. Smith P. Bankhead; Polk's battery, Capt. M. Y. Polk ; Rutledge's battery, Capt. A. M. Rutledge—rendered conspicuous and valuable services. General Wood, reporting the battle of the 7th, testified that when large masses of the enemy were coming...
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