[The illustration indicates by the direction of the boots that the footmen are fleeing already. They are looking back in the direction of their pursuer, the horseman while they stumble and understand that they will be brought down any moment. It's a dramatic scene put in an allegory. The virtue of knighthood overcomes the lack of virtues, personalised in the confrontation of a noble horseman with the lower ranking footmen. A good and brave man realises what is his nature. The rabble runs away and still achieves nothing. I think that is a bit how one could interpret the illustration.]
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I take that interpretation back as in the other manuscripts the bad habits (the footmen) seem already on the ground. A revised interpretation would then go more into the direction of a depiction of the victorious nature of virtue, like the charge of the knight that results in heaps of slain so the victory of the positive virtuous over the negative virtuous.