On the northern side of the ravine the fissures are more numerous and extensive. Some shallow openings at the western end have been in use quite lately, as cellars or pig-sties for some cottages recently pulled down; but a little to the east of these there is a fine fissure (A, fig. 2) with a large cavern-like entrance; this fissure, locally
Fig. 2.—View of Fissure A in Creswell Crags, looking north.
called the "Pin-hole," I have begun thoroughly to explore. It penetrates some 40 or 50 yards into the hill-side, running nearly magnetic north, and is fairly horizontal. It is moderately lofty throughout a good part of its course; but a short distance from its entrance it bifurcates and becomes very narrow, the western fork being inaccessible beyond
Fig. 3.—Transverse vertical Section of the Floor of Fissure A, in Creswell Crags.
