Tom,

As Doyle has stated the 8th and 9th Missouri Infantry were with Frost at Fort Pleasant in the early stages of the LR campaign.

I'm quite certain the 11th and 12th Missouri Infantry were also attached to Parson's Brigade along with the 7th, 10th, and Pindall's Mo. S.S. in the entrenchments north of the river. The 7th would later be redesignated as the 16th, but I can't recall when that new designation went into effect. It may have been after the fall of Little Rock.

Bill