According to tradition, it was this same Alexander Berneval who executed the beautiful circular window in the southern transept. But being rivalled by his apprentice, who produced a more exquisite specimen of masonry in the northern transept, he murdered his luckless pupil. The crime he expiated with his own life; but the monks of the abbey, grateful for his labors, requested that his body might be entombed in their church; and on the stone that covers his remains, they caused him to be represented at full length, holding the window in his hand. These large circular windows, sometimes known by the name of rose windows, and sometimes of marigold windows, are a strong characteristic feature of French ecclesiastical architecture. Few among the cathedrals or the great conventual churches, in this country, are without them. In our own they are seldom found: in no one of our cathedrals, excepting Exeter only, are they in the western front; and, though occasionally in the transepts, as at Canterbury, Chichester, Litchfield, Westminster, Lincoln and York, they are comparatively of small size with little variety of pattern. In St. Ouen, they are more than commonly beautiful. The northern one, the cause of death to the poor apprentice, exhibits in its centre the produced pentagon, or combination of triangles sometimes called the pentalpha.--The painted glass which fills the rose windows is gorgeous in its coloring, and gives the most splendid effect. The church preserves the whole of its original glazing. Each inter-mullion contains one whole-length figure, standing upon a diapered ground, good in design, though the artist seems to have avoided the employment of brilliant hues. The sober light harmonizes with the grey unsullied stone-work, and gives a most pleasing unity of tint to the receding arches. Among the pictures, the-best are, the _Cardinal of Bologna opening the Holy Gate, instead of the Pope_, in the nave; and _Saint Elizabeth stopping the Pestilence_, in the choir: two others, in the Lady-Chapel, by an artist of Rouen, of the name of Deshays, the _Miracle of the Loaves_, and the _Visitation_, are also of considerable merit.--Deshays was a young man of great promise; but the hopes which had been entertained of him were disappointed by a premature death.