19U.K.The Barmaster, if he finds any Mine neglected and not wrought, shall, if required so to do by any Person or Persons, give to the Owner or reputed Owner and the Agent, if any shall be known to him, Notice in Writing that such Mine will at the Expiration of Three Weeks from the Time of serving such Notice, if not duly and reasonably worked, be forfeited; and if at the Expiration of the said Three Weeks the Mine is not so worked, the Barmaster, in the Presence of Two or more of the Grand Jury, may give such Mine to any Person or Persons willing to work the same; provided that nothing herein contained shall authorize the Barmaster to give away such Mine if the Owner thereof be unable to work the same by being hindered by Water, or for want of Air, so long as the Owner thereof is using efficient and diligent Means to the Satisfaction of the Barmaster and Two or more of the Grand Jury to relieve such Mine.