HEADQUARTERS OF INDIAN DEPARTMENT, Cantonment Davis, August 7, 1862.
Maj. Gen. T. C. HINDMAN, Commanding, &c.:
GENERAL: [...]
I am, general, yours, respectfully, DOUGLAS H. COOPER, Colonel, Commanding.
P. S.--I have also ordered the arrest of Capt. Hamilton Pike (and his company), who left here yesterday declaring an intention to take his command out of this department and report to Colonel Carroll. This, if it occurs, will be the second desertion by a captain and his company to the standard of Colonel Carroll, who has encouraged such acts. [...] [ar19_977]

About the previous desertion: I have seen in another message this excerpt from the Alexander Papers:

7/30 to Cooper
best to consolidate the Missouri detachments in Ind. Terr., NW Ark, SW Mo be consolidated under Gen Raines & has made an order to that effect-see enclosed for this reason Capt Johnson Co is not returned to you & you will arrange for the residue of Clarkson’s command to report to Raines-this does not relieve Johnson of disobeying your orders & if guilty will be dismissed from the service

so I wonder if Capt. [maybe Matthew R. ?] Johnson was the captain in question; but having no access to the Alexander Papers [cough, cough...] this is just a wild guess.