Sentence:  The only legitimate claimants must be, Albert of Austria, son of the sister of the last duke John; and the emperor Sigsmund, who might consider this part of Bavaria as a <WSD>lapsed</WSD> fief: that in this quality he had given the investiture of it to his son-in-law 
Meaning of the word marked with <WSD> tags:  Having passed from the original holder or authority; no longer claimed.