Most old towns are like palimpsests, parchments which have been scrawled over again and again by their successive owners. Oxford, though not one of the most ancient of English cities, shows, more legibly than the rest, the handwriting, as it were, of many generations. The convenient site among the interlacing waters of the Isis and the Cherwell has commended itself to men in one age after another. Each generation has used it for its own purpose: for war, for trade, for learning, for religion; and war, trade, religion, and learning have left on Oxford their peculiar marks.