The descriptive note comes from item 414 in :
Henderson, Alice H.
Henderson, Donald Gene
Carl Maria von Weber : a guide to research
New York: Garland, 1990, 385 p.
This is what Donald Gene Henderson had to say:
Shows how the "devil's interval," the tri-tone, pervades all dimensions of the Wolfsschlucht scene and how this scenic fantasy coheres and achieves a semblance of metaphorical reality unintended by Weber.
© Donald Gene Henderson
(c) 2020. Frank Greene. All rights reserved.