He set spurs to his horse and came galloping along at such a pace that in his joyous onrush he thrust his horse's chest against his enemy with a mighty clash and so bowled him over, charger and all.

And when Morold had collected himself somewhat from his fall and was making for his horse, Tristan was already upon him and in a flash had struck his helmet a blow and sent it flying.

Gottfried's Tristan