In the spring of 1861 the Boston Light Infantry went to Fort Warren in Boston Harbor to drill. They formed a quartette to sing patriotic songs, and some one wrote the verses that are known as "John Brown's Body," and set them to the music of an old camp-meeting tune. Regiment after regiment heard the song and carried it with them into camp and battle. So the spirit of the simple crusader went marching on through the war, and his name was linked forever with the cause of freedom. XII AN ARCTIC EXPLORER When Columbus sailed from Palos in 1492 he hoped to find a shorter route to Cathay or China than any that was then known, and the great explorers who followed after him had the same hope of such a discovery in their minds. When men learned that instead of finding a short route to China they had come upon two great continents that shared the Western Ocean, they turned their thoughts to discovering what was known as the Northwest Passage. They hoped to find a way by which ships might sail from the Atlantic to the Pacific Ocean north of America. The great English explorers in particular were eager to find such an ocean route, and this search was the real beginning of the fur-trading around Hudson's Bay, the cod-fishing of Newfoundland, and the whale-fishing of Baffin Bay. One sea-captain after another sailed across the Atlantic, and strove to find the passage through the Arctic regions; but the world of snow and ice defeated each of them. Some went back to report that there was no Northwest Passage, and others were lost among the ice-floes and never returned. Then in 1845 England decided to send a great expedition to make another attempt, and put at the head of it Sir John Franklin, a brave captain who had fought with Nelson and knew the sea in all its variety. He sailed from England May 26, 1845, taking one hundred and twenty-nine men in the two ships _Erebus_ and _Terror_. He carried enough provisions to last him for three years. On July 26, 1845, Franklin's two vessels were seen by the captain of a whaler, moored to an iceberg in Baffin Bay. They were waiting for an opening in the middle of an ice-pack, through which they might sail across the bay and enter Lancaster Sound. They were never seen again, and the question of what had happened to Sir John Franklin's party became one of the mysteries of the age.