Sentence:  Good fool, as ever thou <WSD>wilt</WSD> deserve well at my hand, help me to a candle, and pen, ink and paper : as I am a gentleman, I <WSD>will</WSD> live to be thankful to thee for't. 
Meaning of the word marked with <WSD> tags:  Used to express the future tense, sometimes with some implication of volition when used in the first person. Compare (shall). (from 10th c.)