http://usacac.army.mil/sites/default/files/documents/cace/CSI/CSIPubs/Prices_Mo_Expedition_web.pdf

According to this site:

Dobbin’s Bgde: Col Archibald S. Dobbin
Dobbin’s (Ark) Cav Regt: Maj. Samuel Corley
McGhee’s (Ark) Mtd Infy Regt: Lt Col Jessup Grider12
Witt’s (10th Ark) Cav V: Col A. R. Witt*
Blocher’s (Ark) Btry (one section): Lt J. V. Zimmerman – two guns