This is what I found after posting this message on the counties that are a part of the Arkansas River Valley:

Van Buren (Crawford County)
Alma (Crawford County)
Ozark (Franklin County)
Booneville (Logan County)
Clarksville (Johnson County)
Russellville (Pope County)
Dardanelle (Yell County)
Morrilton (Conway County)
Conway (Faulkner County)
Heber Springs (Cleburne County)
Searcy (White County)
Source: http://encyclopediaofarkansas.net/encyclopedia/entry-detail.aspx?entryID=441

These are the women that were tortured in Johnson County that I have in my notes plus annotations:

Fiendish Artocities
Mrs. Wiley (Mary Ann Hogan) Harris, burned and whipped severely. (Perry, Johnson, Arkansas)
Mrs. Maj. (Elizabeth Ward; sp: Major Thompson) Thompson, burned head, arms and hands. (Pittsburg, Johnson, Arkansas)
Mrs. O. (Jane S. Gill; sp: Orren Wallace) Wallace, knocked down and whipped severely. (Pittsburg, Johnson, Arkansas)
Mrs. Susan J. (sp: John R. Willis d: 1854) Willis, feet burned severely. (Pittburg, Johnson, Arkansas)
Mrs. S. J. (Lutetia M. Willis, sp: Seth Jones Howell; par: Matthew G. and

Sarah "Sallie" (Rice) Willis) Howell, burned from the knee down; but little hope of recovery. (Pittburg, Johnson, Arkansas)
Mrs. Emaline M. "Emma" (maiden: King sp: Thomas May) May, ... feet burned severely. (Pittsburg, Johnson, Arkansas)
Mrs. L. M. C. (Isabella S. May) Swaggerty, feet burned severely. [6] (Pittburg, Johnson, Arkansas)