Sentence:  ... the wisdom and prudence of penal-laws become the more necessary in the colonies to prevent the ill treatment of those friendless captives, brought solely for colonial interests into those states; and also for laws not only granting them immediate <WSD>fosterage</WSD> and protection, but holding out to them, after due and faithful services, profits and interests in those very states. 
Meaning of the word marked with <WSD> tags:  The act of caring for another human being or animal.