Sentence:  After messe a morsel he and his men token; Miry was the mornyng, his <WSD>mounture</WSD> he askes. Alle the hatheles that on horse schulde helden hym afier Were boun, busked on hor blonkkes bifore the halle yates. 
Meaning of the word marked with <WSD> tags:  A horse or other animal used for riding; a mount.