No part of the ancient decoration of our churches has suffered more than the paintings and frescoes which formerly adorned their walls. In the whole of the country there are very few of the ancient edifices which retain any traces of the numerous quaint designs and figures painted on the inner surfaces of their walls during the Middle Ages. Our ancestors used to make free use of colour for the purpose of architectural decoration, and employed several means in order to produce the effect. They sometimes used fresco, by means of which they produced pictures upon the walls covered with plaster while the plaster was wet. Sometimes they employed wall-painting, _i.e._ they covered the walls when the plaster was dry with some pictorial representation. The distinction between fresco and wall-painting is frequently forgotten. Most of the early specimens of this art are monochromes, but subsequently the painters used polychrome, which signifies surface colouring in which various colours are employed. The vaulted ceilings, the timber roof, the screens and canopies, the monuments with their effigies, as well as the surface of the walls, were often coloured with diaper-work. Colour and gilding were marked features in all mediaeval buildings, and even richly carved fonts and sculptural monuments were embellished with this method of decoration. The appearance of our churches in those times must have been very different from what it is now. Then a blaze of colour met the eye on entering the sacred building, the events of sacred history were brought to mind by the representations upon the walls, and many an unlearned rustic acquired some knowledge of biblical history from the contemplation of the rude figures with which his village church was adorned. "Even the very walls of this dread place, And the tall windows, with their breathing lights, Speak to the adoring heart." The practice of painting the walls of our churches dates as far back as Saxon times; but very few fragments of pre-Norman art remain. Of Norman work we have numerous examples, and sometimes it is found that the early specimens of the art have been painted over in later Gothic times, and ruder and larger figures have eclipsed the more careful work of previous ages. An example of this was discovered in the church of St. Lawrence, Reading, where no less than five distinct series of paintings were discovered, painted one over another. [Illustration: THE CRUCIFIXION, HATFORD, BERKS]