The LIBRARY, the building of which was commenced in 1801, is an apartment of much magnificence. The book-cases and reading-galleries are supported by fifteen columns, wrought out of the richest Spanish mahogany; while the spidered roof displays a beauty of workmanship and delicacy of carving, enriched with fruit-foliage, which have seldom been surpassed. It is divided into several compartments for reading recesses, and communicates with the ALFRED SALOON by folded doors. The CHAPEL adjoins the Baron’s Hall, and is a chaste and beautiful apartment. It is not necessary further to describe the interior of the castle; but it will be well to note that a chamber over the inner gateway enjoys the traditionary fame of having been the sleeping-place of the Empress Matilda. It is a low square apartment, and contains a bedstead which the queen is said to have occupied; but, unfortunately for the charm of the tradition, it is some centuries later in date than the time in which she lived. Under the east end of the castle is a large vault, upwards of 60 feet in length, the massive walls of which are formed of blocks of chalk, strengthened with ribs of stone, and are of about 7 feet in thickness. This vault was used, of course, as a place of safety for prisoners, and a curious instance of escape from it is recorded. It seems that in the year 1404 one John Mot was here confined on a charge of robbery, but contrived to make his escape. Before he could get clear away, his flight was discovered, and he was followed. Finding himself closely pursued, he suddenly turned to the College of the Holy Trinity, and seizing the ring attached to the gate just as his captors were about to lay hands on him, claimed the right of sanctuary. He was, however, forcibly seized, and carried back to prison. Knowledge of the affair reaching the ears of the priests, two of the parties who assisted the constable in making the seizure of Mot were summoned before the bishop, found guilty, and “ordered to make a pilgrimage on foot to the shrine of St. Richard at Chichester, to present an offering there according to their ability, to be cudgelled (_fustigati_) five times through the church of Arundel, and five times to recite the paternoster, ave, and creed, upon their knees before the crucifix of the high altar.” Before the sentence, however, could be carried into execution, the prisoner was wisely restored to the church, the cudgelling was remitted, and offerings of burning tapers were substituted. A word may be said about the fine old horned owls that at one time gave renown to the Keep—owls of a peculiar breed, and about whom many curious anecdotes have been related. At present, however, they greet the visitors under glass, in cases; but it is understood that some of their progeny are preparing to take the places in life of the old denizens of the time-honoured ruin.