What does DROVER'S PASS mean?

DROVER'S PASS meaning in Law Dictionary

no-cost pass given by a railroad organization, accepting a droveof cattle for transportation, into the drover which accompanies and cares for the cattle onthe train. Railroad Co. v. Tanner, 100 Va. 379, 41 S. E. 721; Railway Co. v. Ivv, 71 Tex.409, 9 S. W. 346, 1 L. R. A. 500, 10 Am. St. Rep. 758.