32 Pa. Stat. § 552
From and after the passage of this act it shall not be lawful for any person or persons, without authority from the owner or owners, to catch, stop, take up or detain any lumber of any of the kinds mentioned in the first section of this act excepting masts, spars, square timber and boards, which shall be floating in any of the streams or main river above said Susquehanna boom, mentioned in said section, having thereon any duly registered mark, under any pretense whatsoever, and the owner or owners of any of the kinds of lumber aforesaid, marked with duly registered marks, or his, her or their agent or agents, shall be entitled to take possession of and remove, at his or their pleasure, any lumber of any of the kinds before mentioned, so taken up, stopped or detained, as aforesaid, contrary to the provisions of this act without being in any manner liable for damages or expenses incurred by any person or persons so taken up, stopping or detaining the same, as aforesaid, without let or hindrance, upon the production of the certificate of the prothonotary made in conformity with the provisions of this act either by the owner of the mark mentioned therein, or by any other person or persons, agent or agents, with the authority from the owner or owners, in writing, indorsed thereon or annexed thereto for the purpose, and duly acknowledged before any officer authorized to take acknowledgments of deeds or other writings: Provided, That this section shall not apply to any incorporated boom company, or to lumber of any of the kinds aforesaid, taken up below said Susquehanna boom; and that for the purpose of encouraging persons to catch, take up and secure logs and lumber floating down the Susquehanna river, below the Susquehanna booms, it shall and may be lawful for any person or persons so taking up and securing any of the said kinds of lumber, so found floating down the said river, below said booms, to charge and receive from the owner or owners of said lumber the sum of fifty cents per thousand feet, board measure, and to have a lien upon the same until payment is made or tendered by the owner or his agent; and for all such lumber, as aforesaid, taken up below the Columbia bridge, seventy-five cents per thousand feet, board measure.
32 P.S. § 552