Thanks for the comments, and the interest. The Marshal commands only 24
squares...below is a diagram which I hope will come out.
+---+---+---+---+
| | * | * | |
+---+---+---+---+
| | * | | * |
+---+---+---+---+
| | | * | * |
+---+---+---+---+
| R | | | |
+---+---+---+---+
This shows one-fourth of the Marshal's coverage. I hope it helps.