Adrin could have easily parried with the off-hand dagger but instead twisted and caught the point of Jon's sword in the guard of his own rapier.
Adrin parried with his off-hand dagger.
mnli hypothesis: Adrin parried with his off-hand dagger. premise: Adrin could have easily parried with the off-hand dagger but instead twisted and caught the point of Jon's sword in the guard of his own rapier.