Over the entrance of a little cavern in one of the rocks hanging above the Rhine-stream at Rolandseck, and covered with odoriferous cactuses and silvery magnolias, the traveller of the present day may perceive a rude broken image of a saint: that image represented the venerable Saint Buffo of Bonn, the patron of the Margrave; and Sir Ludwig, kneeling on the greensward, and reciting a censer, an ave, and a couple of acolytes before it, felt encouraged to think that the deed he meditated was about to be performed under the very eyes of his friend's sanctified patron.