From Marlin:  In Marlin, take Hwy 7 East towards Kosse.  When you get to the stoplight in Kosse, that will be the intersection of Hwy 7 (east to west) & Hwy 14 (north to south)  You will make a right turn onto Hwy 14 heading South.  You will not go very far on Hwy 14, maybe 5 miles or so, and Mustang Prairie Cemetery will be on  your left.  There will be a sign for it before you get there.