Sentence:  ... while the King and Godwine sate at the table, accompanied with others of the nobilitie, it <WSD>chanced</WSD> the cupbearer (as he brought wine to the bourd) to slip with the one foote, and yet by good strength of his other leg, to recover himselfe without falling ... 
Meaning of the word marked with <WSD> tags:  To befall; to happen to.