penetrated its depths, and no voice of loudest thunder had ever waked an echo there. The silence was perfect, save the sound of breathing which each one tried to suppress, and the throbbing of our hearts that ‘Still like muffled drums were beating, Funeral marches to the grave.’ “God spoke in that stillness with a voice such as I had never heard before. I had never before so realized how awfully impressive were darkness and silence. I had entirely new ideas of the awful solitude of that period when the ‘earth was without form and void, and darkness was upon the face of the deep.’ “On getting beyond this river, we entered a region of avenues of incredible if not of interminable length, which have been discovered within the last twelve or fifteen years. One of the first of these is called Silliman Avenue, in honor of Professor Silliman, who has made very thorough explorations of the cave. This avenue is a mile and a half long, about three rods wide, and has various interesting features which I have not time to notice. At the termination of this avenue, the cave widens into a large room, several rods wide, and some fifty or sixty feet high, which is called Ole Bull’s concert-room, from the fact that this musician gave a free concert there to the visitors who were at the cave at the time of his visit. “Beyond this room, we entered an avenue two miles long, called the Pass of El Gor. This is an exceedingly rocky and uneven avenue, leading, by a most circuitous path up and down great piles of rock, along a most rugged and desolate way, near deep holes and fissures in the rocks, until at length we come to a fine sulphur spring called Hebe’s Spring, which we found very refreshing. Here, through a narrow opening in the rocks, we climb a ladder eighteen feet high, and find a scene that abundantly compensates for the rough walk we have taken to reach it. On reaching the top of this ladder, we find ourselves in Martha’s Vineyard. Here is a vast room, the sides of which are covered over with a formation resembling grapes. They hang on the wall above, plump, round and perfect in form, and in the greatest profusion. They are so solid and hard that it is difficult to break off any of the clusters, and are said to be formed by the drippings of the water through the rocks. Near the head of the ladder there is a fine representation of a vine, of solid rock, running along the wall; and apparently connected with this vine, there are seemingly cart-loads of these rocky grapes. Our guide illumined the vineyard with one of his Bengal lights, and the view was magnificent.