I can tell you that the official date of Crawford's cavalry org was Dec of 1863 but he had a battalion sized element operating much earlier but it doesn't seem to have any designation. It was primarily Mark Miller's Company (from Saline) that became Co B and he mentions a bunch of conscripts who desert him up in north Arkansas during the summer months of 1863. Anyway, it was also known as the 10th Arkansas Cavalry as well as the first.

One other addition, on the 1st Ark Mtd Rifles you might want to add COL Daniel H. Reynolds. He actually took over and led the regiment longer than Churchill or anyone else for that matter. He led it and then took over Brigade command when McNair left and he succeeded in getting appointed over the sr colonel, DAvid Coleman of the 39th NC Inf. When I get more time I will go through and see if there is anything I can add for you.