When any persons appropriate for a burying ground a piece of land containing not more than 1/2 of an acre, it shall be exempt from attachment and execution, and inalienable and indivisible by the owners without the consent of all; and be kept fenced or otherwise substantially marked and occupied as a burying ground. They shall cause a written description of it, under their hands, attested by 2 disinterested witnesses, to be recorded in the registry of deeds in the county or district where it lies or by the clerk of the town where it is situated.