small boats—and a tight squeeze it is, too. You can not go in at all when the tide is up. Once within, you find yourself in an arched cavern about one hundred and sixty feet long, one hundred and twenty wide, and about seventy high. How deep it is no man knows. It goes down to the bottom of the ocean. The waters of this placid subterranean lake are the brightest, loveliest blue that can be imagined. They are as transparent as plate glass, and their coloring would shame the richest sky that ever bent over Italy. No tint could be more ravishing, no lustre more superb. Throw a stone into the 
BLUE GROTTO. water, and the myriad of tiny bubbles that are created flash out a brilliant glare like blue theatrical fires. Dip an oar, and its blade turns to splendid frosted silver, tinted with blue. Let a man jump in, and instantly he is cased in an armor more gorgeous than ever kingly Crusader wore.
Then we went to Ischia, but I had already been to that
