It shall be lawful for the valuer acting in the matter of any inclosure, with the consent in writing of the person interested in any old inclosed lands, or lands holden in severalty, or otherwise not subject to be inclosed under the general provisions herein-before contained, but within the parish in which the land to be inclosed, or some part thereof, shall be situate, or within some parish adjoining thereto, to order and direct such old inclosed lands or other lands as last aforesaid to be considered as allottable, and parcel of the land to be inclosed; and such allowance shall be made to the person interested in such lands, on account of the situation or other beneficial circumstances thereof, as the valuer shall adjudge to be just and reasonable; and he shall allot and award unto the person so interested in such old inclosed lands or other lands as aforesaid so much and such part of the land to be inclosed as he shall think reasonable and just.