All purchases of lands, tenements and hereditaments, within this Commonwealth, not exceeding five thousand acres, heretofore made, by 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 have been at the time or times of such purchase or purchases, at war with the United States of America, and who are residents within the United States, are hereby confirmed, and it shall be lawful for all and every such foreigner and foreigners, alien or aliens, 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.