The plan of this building is a Latin cross, with aisles to the nave, two little chapels on each side of the straight part of the choir, and a very narrow aisle behind the choir. A gallery or triforium runs round the building at the usual height, and a second within the windows of the clerestory. In Gothic churches, the glass of the upper windows is usually over the range of little shafts forming the triforium, here it is over the wall, forming the back of the gallery. At the _rond point_ this gallery occupies the whole width of the aisle below; a very wide gallery, though a very narrow aisle; and it is there lighted by circular windows, but whether these belong to the original design I cannot tell. One end of the transept presents an arrangement somewhat similar to that of St. Leger, at Soissons, with five equal lancet windows below, and a rose window above. The work of the rose window fell out some time ago, and it is now quite naked. The five windows below are long and narrow, and without any tracery: indeed there is no tracery in the church. They have externally six shafts, at some distance from the wall, supporting little pointed arches; internally, there are only three shafts, which of course do not correspond with the windows; and they support flat scheme arches on little blocks. Over the intersection of the cross is a square tower, with a circular turret at each angle. The inside of this tower is ornamented with very slender shafts, and arches upon them, and was certainly intended to be exposed from below to the interior of the church; the present vaulting of that part being an awkward posterior addition. The old vaulting, above these shafts, was begun, but never completed.
While I was making sketches in this church, a girl took a chair just behind me, in order at the same time to perform her devotions, and to see what I was about; but religion and curiosity combined were insufficient to keep her awake. Soon after, the same blacksmith who had so well criticised the porch at St. Michel, came up and offered to conduct me all over the church, of which he had the keys. I assented to his proposal, and was not a little struck with the extreme thinness of the walls: those of the turrets, though rising 100 feet from the roof, are not 6 inches thick, and other walls are about in the same proportion. Indeed, the architect seems to have loved lightness ‘_à la folie_;’ for, in ornamenting the inside of his tower, he has used shafts 20 feet long, and only 7 inches in diameter, and one of these is of a single stone: several other shafts are about 15 feet long, and 5½ inches in diameter, each of a single piece, and all perfectly detached from the wall for their whole length. They are of a very hard stone, and so are also some of the thinnest parts of the masonry: the rest of the walls and piers are of a material less hard and heavy, and the vaulting, which is in oblique groins, is of a stone extremely light and porous. They are all found within a few leagues of the place.