Sentence:  Thenne he sente the varlet ageyne and bad hym telle Kyng Mark that I wille come as soone as I am hole / for <WSD>erste</WSD> I maye doo hym noo good / Thenne Kynge Mark hadde his ansuer / There with came Elyas and badde the Kynge yelde vp the castel<!--Telle Kynge Marke that I woll com as sone as I am hole, for <WSD>arste</WSD> I may do hym no goode.--> 
Meaning of the word marked with <WSD> tags:  Sooner (than); before.