Statistics for occurrence #1 of “Maj. Wm. O. Yager” in chapter 8 of Col. O. M. Roberts, Confederate Military History, a library of Confederate States Military History: Volume 11.1, Texas:

...s Christi. Maj. Joseph Taylor, cavalry battalion, and Capt. Jas. Duff, two companies, at San Antonio. Col. P. N. Luckett's infantry regiment, ten companies; Capt. R. Benevides, one cavalry company; Maj. Wm. O. Yager , four cavalry companies; Capt. E. Cruegbaur's heavy artillery; Capt. R. B. Maclin's light artillery, and Capt. S. Benavides, one cavalry company, on the Rio Grande from Fort Brown to Laredo. Alth...
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