Sentence:  I do acknowledg my self not to be a little beholding to the "Italian" and "Spanish" Treatises; though without my <WSD>fosterage</WSD>, and bringing up under the "Generosities" and "Bounties of my Noble Patrons and Masters", I could never have arrived to this Experience. 
Meaning of the word marked with <WSD> tags:  The act of caring for another human being or animal.