If the master of any vessel retains a pilot on board, the wind and weather permitting her going to sea, the pilot is entitled to $50.00 for every day of such detention. If a master carries off a pilot from the Bay or Harbor of Mobile, he must pay him $50.00 for every day of such absence and supply him with such provisions as is usual for the maintenance of masters, and first class transportation back to Mobile, Alabama, the master as well as the owner being liable therefor, unless the vessel has laid to for the space of four hours after crossing the bar, and no pilot boat appears to receive the pilot on board.