The Sheldon Reynolds "Sherlock Holmes" series starring Ronald Howard had a lot of success taking the familiar characters of Holmes and Watson, and putting them in bizarre, humorous, and outlandish situations (or with such people) for comic and novel effect. The idea of Holmes solving a case brought to him by an uncouth Texas cowgirl certainly has possibilities, but on this occasion the execution lets the show down. Though Ronald Howard and H. Marion Crawford turn in their usual good efforts as Holmes and Watson, this episode depends heavily on Lucille Vines' performance as Minnie the cowgirl. Unfortunately, she's not very good.
Vines plays her part as the broadest possible stereotype in a bad accent that sounds more minstrel-show than Texas, and delivers a lot of flat and awkward line readings. There is some good material in the script (and especially fun is the scene where Watson is literally lassoed into participating in Holmes' investigation) but the crucial element of a guest star who has comic charisma and timing to pull of the material is missing. This hurts especially since the mystery of the episode is fairly standard and mainly distinguished by the fact that it involved a tomahawk.
This episode is silly enough to be entertaining, but it isn't especially good compared to other equally silly entries in this series.