H. C. Hovey—-Discoveries in Western Caves. 465 
her if she recollected the great earthquake of Lisbon. She 
replied, that it was the event of all others in her long life 
which she ought to vividly recollect, on account of its impres- 
sive sensations. History also records the sensational character 
of the destruction of Pompeii. If Mr. Scrope’s innuendo re- 
garding the internal fluidity of the earth as “a sensational hypo- 
thesis” has any value, we should regard the events referred to 
as highly improbable; yet they have been as well authenti- 
cated as the most positive facts in science, and no person has 
ever expressed the smallest shadow of a doubt as to their occur- 
rence, ' 
—, 
Art. LV.—Discoveries in Western Caves; by Rev. Horace 
ovEY, MA 
E following notes are selected from a large mass of descrip- 
tive material, collected by the writer during recent under- 
ground explorations in some of the States of the Mississippi 
Valley. 
Upper Silurian, while the excavation itself is in the softer rocks 
of the Lower. Two miles west of Hanover, Indiana, is a stream 
* Geological Survey of Kentucky (Shaler), vol. i, p. 4. 
Am. Jour. 8c1.—Tuirp eo Vou. XVI, No. 96.—Dzc., 1878. 
