From and after the passing of this act, it shall and may be lawful for all and every foreigner and foreigners, alien or aliens, not being the subject or subjects of some Sovereign, State or Power which is or shall be at the time or times of such purchase or purchases at war with the United States of America, to purchase lands, tenements and hereditaments within this Commonwealth, not exceeding five thousand acres, and to have and to hold the same to them, their heirs and assigns forever, as fully to all intents and purposes as any natural born citizen or citizens may or can do.