"He next began a course of self-instruction. He had been advanced in the factory from a 'piecer' to the spinning-jenny. He brought his books to the factory, and placing one of them on the 'jenny,' with the lesson open before him, he divided his attention between the running of the spindles and rudiments of knowledge. He now began to aspire to become a preacher and a missionary, and to devote his life in some self-sacrificing way to the good of mankind. He entered Glasgow University. He knew that he must work his way, but he also knew the power of resolution, and he was willing to make almost any sacrifice to gain the end. He worked at cotton-spinning in the summer, lived frugally, and applied his savings to his college studies in the winter. He completed the allotted course, and at the close was able triumphantly to say, '_I never had a farthing that I did not earn_.' "That boy was Dr. David Livingstone." "An excellent story," said Master Lewis. "A sermon in a story, and a volume of philosophy in a life. Now, Tommy, what is the most attractive thing _you_ have seen?" "I see it now. Oh, look! look!" said Tommy, flying to the window. The full moon was hanging over the great castle, whitening its grim turrets. The boys all gazed upon the scene, which appeared almost too beautiful for reality. "It looks like a castle in the sky," said Wyllys. Story-telling was at an end. So the exercises ended with an exhibition of Edinburgh Castle by moonlight. [Illustration: {CÆSAR'S LEGIONS LANDING IN BRITAIN.}] CHAPTER VII. A RAINY EVENING STORY AT CARLISLE. The Druids and Romans.--The Story of the Jolly Harper Man.--"When first I came to Merry Carlisle." "Carlisle!" said Master Lewis, as the cars stopped at a busy looking city, the terminus of many lines of railway. "Carlisle?" asked Frank Gray, glancing at the evidences of business energy about the station. "Carlisle? I have heard that the city was a thousand years old." "An old city may grow," said Master Lewis, on the way to the hotel. "In 1800, Carlisle had but 4,000 inhabitants, now it has more than 30,000." Carlisle was the ancient seat of the kings of Cambria, and was a Roman station in the early days of the Christian era. It was destroyed in 900 by the Danes, was ravaged by the Picts and Scots, was doubtless visited by Agricola, Severus, and Hadrian, and it has a part in the history of all the Border wars. Here half-forgotten kings lived; here Roman generals made their airy camps, and near it the grotesque ships of Roman emperors dropped their sails in the Solway. Here Christianity made an early advent, and the hideous rites of the Druid priests disappeared. [Illustration: ROMANS INVADING BRITAIN.]