When two or more persons shall have mutually agreed to lay off certain lands in city or town lots or blocks, and to distribute such lots or blocks among themselves, and have caused such lands to be surveyed into lots or blocks, and a map or plat thereof to be made pursuant to such agreement, and have agreed to determine the several lots or blocks to belong to each by lot or chance, or in any other specified manner, and have proceeded accordingly and so determined the several lots or blocks to belong to each in severalty, and one or more such persons pursuant to such agreement and determination shall have received a conveyance of their lots or blocks so determined to belong to him or her or them, or any part thereof, and all others of said persons not having received such conveyances shall be able and willing to fulfill such agreement by making the necessary conveyances, although none of such agreements shall have been made in writing, and whether the same were made before or after the passage of this act, they shall be, as against such as have received such conveyance, valid; and upon action duly brought the specific performance thereof, by making all conveyances necessary to fulfill and carry into effect such agreements and determination, shall be adjudged and enforced.