Anne J. Bailey, ed. In the Saddle with the Texans: Day-by-Day with Parsons' Cavalry Brigade, 1862-1865.

6/3/62 Spec Order #2 HQs Advance of the Army of the TM Dist.-near Bayou Des Arc-Maj Headrick [cdg Coleman’s Cavalry] to report with his whole command to these hqs, leaving surplus baggage at Austin

6/3/62 Hd.Qrs Advance of the Army of TM Dist near Bayou Des Arc, White Co-Special Order No 2- By order of Col W.H. Parsons Cdg
[1] Immediately upon the receipt of this order Major Headrick will report to these hd qrs with his entire command leaving at Austin all surplus baggage.
[2] Major Headrick will bring with him his full train of wagons.

[Footnote in book for Headrick] says he commanded Coleman's regiment of Cavalry.

6/4/62 HQs Advance of the Army of TM Dpt-Special Order No. 8- By order of Col W. H. Parsons Cdg
Major Headrick Cdg Coleman's Regt Cavalry C.S.A. will await instructions from Gen Roan & if not directed to join his regimental commander or he will report promptly to these headquarters.

[Headrick is shown as Major Silas Headrick in "Price's Lieutenants" in the 4th Cavalry Regt of the 7th Division MSG. The Col of this regiment is Col W. O. Coleman.]