Every Person that shall use any Light or Eire of any kind, or any Spear, Leister, Gaff, or other like Instrument, or Otter, for catching Salmon, or any Instrument for dragging for Salmon, or have in his Possession a Light or any of the foresaid Instruments under such Circumstances as to satisfy the Court before whom he is tried that he intended at the Time to catch Salmon by means thereof, shall be liable to a Penalty not exceeding Five Pounds, and shall forfeit any of the foresaid Instruments and any Salmon found in his Possession; but this Section shall not apply to any Person using a Gaff as auxiliary to angling with a Rod and Line.