Confederate Military History (Arkansas) contains the following references:
Referring to the 11th/17th Arkansas - "They had a sanguinary encounter with Federal cavalry at Keller's Lane, June 23, 1863, in which Lieutenant DeVaughn was wounded and maimed for life." (p. 310)
Fold3 contains a letter in DeVaughn's records stating that the action took place on the 19 June 1863.
CMH - referring to the 15th Arkansas - "The regiment after reorganization was sent south to Louisiana to resist Banks, and fought in many minor engagements - Cross Landing, Greenfield, Plum's Store, and with the First Alabama and Thirteenth Mississippi, engaged at Keller's Lane a largely superior force of Federals, which they routed, taking many prisoners and valuable stores." (p.313)
Doubtful as to the 13th Mississippi as they were serving in the ANV at the time...