Trail of Darkness

Even though he's been savagely beaten, Deputy Marshal Clay McCord can't tell outlaw gang members where their wounded associate has been hidden by Marshal Simon Fry, because he didn't know. When Fry is abducted by the same gang, McCord leads his posse in pursuit. He tracks the gang's progress to their hideout by pretending to be tied up and hidden under a tarpaulin in the back of a wagon, so he can remember the sound and feel of the road.