peered into the dark streets, many a head was judiciously hidden behind bowed shutters, to see who went toward the Convent; till by wit and scheming and after some months of most surprising incident, Louise carried her point, left the good Ursulines to a well-merited repose, and returned to the Castle of Mirabeau,--to laugh at the townsfolk of Sisteron. [Illustration: "THE CATHEDRAL IS NEAR THE HEAVY, ROUND TOWERS OF THE OUTER RAMPARTS."--SISTERON.] [Illustration: "THE BRIDGE ACROSS THE DURANCE."--SISTERON.] When in the city, the prelates occupied their Castle of the Citadel with the high lookouts and defences, far from their Cathedral, which is in the lower town near the heavy, round towers of the ramparts. This church, which has been very slightly and very judiciously restored, is of unknown date, probably of the XII century, it is faithful to the native architectural tradition, and in some details more interesting than many of the Provencal Cathedrals. Its exterior is small and low. There are the familiar, friendly little apses of the Romanesque; near them, above the east end of the north aisle, the squat tower with a modest, modern spire; and at its side, above the roof-line, is the octagon that stands over the dome. All this structure is unaffectedly simple. The walls and buttresses which enclose the aisles are plain, and it is only by comparison with this architectural Puritanism that the facade may be considered ornate. Near the top of its wall, which is supported by sturdy piers, are three round windows, with deep, splayed frames. The largest of them is directly above the high, slender portal that is somewhat reminiscent of the Italian influence, so elaborately marked further up the valley, at Embrun. The rounded arch of the door-way and its pointed gable are repeated, on either side, in a half-arch and half-gable. An allegorical animal, in relief, stands above the central arch, and a few columns with delicate capitals complete the adornment of the entrance-way, which, in spite of being the most decorative part of the church, is most discreet.