Here is some more info. for you.
-History of the Tenth Tennessee Cavalry CSA-
http://www.floridareenactorsonline.com/10TN.htm
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Tenneessee Historical Quarterly
Gildrie, Richard P. “Guerilla Warfare in the Lower Cumberland River Valley, 1862—1865.” Tennessee Historical Quarterly 49, no. 3 (Fall 1990), 161—176.
Page 166 mention's Napier's Battalion
http://www2.volstate.edu/teach/thq/guerrilla warfare in the lower cumberland.pdf
What company and County was your ancestor from? Mine were from Dickson County and Companies "I"& "E"
-John