This book is in no degree an attempt to relate the involved and intricate history of the Middle Ages. Its plan is, rather, to present pictures of the manner of life and habits of thought of the people who lived between the eighth and fifteenth centuries. Our writings and our everyday conversation are full of their phrases and of allusions to their ideas. Many of our thoughts and feelings and instincts, of our very follies and superstitions, have descended to us from them. To become better acquainted with them is to explain ourselves.