And therewithal Sir Persides saw a knight coming out of a castle all that ever he might fling. Beware, sir, said Sir Persides, yonder cometh a man that will have ado with you. Let him come, said Sir Percivale. And so he met with that knight in midst of the bridge; and Sir Percivale gave him such a buffet that he smote him quite from his horse and over a part of the bridge, that, had not been a little vessel under the bridge, that knight had been drowned. And then Sir Percivale took the knight’s horse and made Sir Persides to mount up him; and so they rode unto the castle, and bade the lady deliver Sir Persides’ servants, or else he would slay all that ever he found; and so for fear she delivered them all. Then was Sir Percivale ware of a lady that stood in that tower. Ah, madam, said Sir Percivale, what use and custom is that in a lady to destroy good knights but if they will be your paramour? Forsooth this is a shameful custom of a lady, and if I had not a great matter in my hand I should fordo your evil customs.