They were soon thoroughly warmed up by this vigorous exercise, and forgot their recent bath and the king's danger. It was a drawn battle, however, and, as they paused for breath, King Charles said: "Trust that to drive away cold and ague, Arvid. Faith, 't is a rare good sport." "Could it be done on horseback, think you?" queried Arvid, always on the look-out for sensation. "And why not? 'T is well thought," said the king. "Let us straight to the palace yard and try it for ourselves." But ere they reached the palace the idea had developed into still greater proportions. The king's guards were summoned, and divided into two parties. Their horses were unsaddled, and, riding "bareback" and armed with nothing but hazel-sticks, the two forces were pitted against each other in a great cavalry duel of "single-stick." King Charles commanded one side, and young Arvid Horn the other. At it they went, now one side and now the other having the advantage, the two leaders fighting with especial vigor. Arvid pressed the king closely, and both lads were full of the excitement of the fray when Charles, careless of his aim and with his customary recklessness, brought his hazel-stick with a terrible thwack upon poor Arvid's face. Now, Arvid Horn had a boil on his cheek, and if any of my boy readers know what a tender piece of property a boil is, they will know that King Charles' hazel-stick was not a welcome poultice. With a cry of pain Arvid fell fainting from his horse, and the cavalry battle at "single-stick" came to a sudden stop. But the heat and the pain brought on so fierce a fever that the lad was soon as near to death's door as his friend King Charles had been in the sea fight of the squirt-guns. The king was deeply concerned during young Arvid's illness, and when the lad at last recovered, he made him a present of two thousand thalers, laughingly promising to repeat the prescription whenever Arvid was again wounded at "single-stick." He was greatly pleased to have his friend with him once more, and, when Arvid was strong enough to join in his vigorous sports again, one of the first things he proposed was a great bear-hunt up among the snow-filled forests that skirted the Maelar Lake. A day's ride from Stockholm, the hunting-lodge of the kings of Sweden lay upon the heavily drifted hill-slopes just beyond the lake shore, and through the forests and marshes two hundred years ago the big brown bear of Northern Europe, the noble elk, the now almost extinct aurochs, or bison, and the great gray wolf roamed in fierce and savage strength, affording exciting and dangerous sport for daring hunters. And among these hunters none excelled young Charles of Sweden. Reckless in the face of danger, and brave as he was reckless, he was ever on the alert for any novelty in the manner of hunting that should make the sport even more dangerous and exciting. So young Arvid Horn was not surprised when the king said to him: