Let us say you have for whatever reason a vast amount of land. Before England’s thriving development of the woollen industry (involving as it did the taxation of exports in the hands of foreign merchants), land ownership was the predominant feudal source of income for the Crown (that is, the current king). As a result limitations upon ownership were of interest and consequence. Whether the device were to extend the period of real or “vested” entitlement (against which the Rule against Perpetuities applies) or to promote the legal fiction of what we now call a “corporation” that is, a legal person that has perpetual existence and never dies (against which the law of mortmain applies), the conclusion is that ownership of land can never be forever undetermined; and, that violation of that status cannot by any interpretation limit the Crown’s privilege of taxation or, in the event of indeterminable ownership, the Crown’s privilege of escheat (reversion to the crown where prior owner dies without heirs).