General Regulations, no. 5, Rules and Regulations: Mesa Verde National Park (Government Printing Office 1920).

“RULES AND REGULATIONS.
GENERAL REGULATIONS.
(In effect March 1, 1920.)

    The following rules and regulations for the government of the Mesa Verde National Park are hereby established and made public, pursuant to authority conferred by the acts of Congress approved June 29, 1906 (34 Stat., 616), June 30, 1913 (38 Stat., 82), and August 25, 1916 (39 Stat., 535)…

     ...5. Hunting.—The park is a sanctuary for wild life of every sort and hunting, killing, wounding, capturing or frightening any bird or wild animal in the park, except dangerous animals when it is necessary to prevent them from destroying life or inflicting injury, is prohibited.
    The outfits, including guns, traps, teams, horses, or means of transportation used by persons engaged in hunting, killing, trapping, ensnaring, or capturing birds or wild animals or in possession of game killed on the park lands under circumstances other than prescribed above, shall be taken up by the superintendent and held subject to the order of the Director of the National Park Service, except in cases when it is shown by satisfactory evidence that the outfit is not the property of the person or persons violating this regulation, and the actual owner was not a party to such violation. Firearms are prohibited in the park except on written permission of the superintendent. Visitors entering or traveling through the park to places beyond, shall, at entrance, report and surrender all firearms, traps, nets, seines, or explosives in their possession to the first park officer, and in proper cases may obtain his written leave to carry them through the park sealed. The Government assumes no responsibilities for loss or damage to any firearms, traps, nets, seines, or other property so surrendered to any park officer nor are park officers authorized to accept the responsibility of custody of any property for the convenience of visitors.”