14. Whenever such supervisor shall consider that the cutting down and removal of any tree or the removal of any other obstruction is necessary he may in cases of emergency at once remove the same, and may for that purpose enter on any private property.In cases not of an emergent nature, he shall serve a notice in writing on the owner or occupier of such private property, directing him to remove the same within a reasonable time.If the owner or occupier cannot be found, notice may be served by notification to be affixed in some conspicuous place in the nearest village.If the owner or occupier shall not remove the obstruction within the time given in the notice, the supervisor may proceed to remove it himself and may for that purpose enter on any private property.Payment of all expenses of such removal may be enforced by the sale of the thing removed in the manner provided for the recovery of tolls in section 9 of this Act.