"Come over here and see these lovely medusæ," said Miss Helen.

"It's a great place, isn't it?" said Carter joining her. "I'd no idea it would be so tremendously interesting."

"It is the greatest place of its kind in the world, I suppose. Its equipments are very complete, and it is resorted to for study by marine biologists all over the world. The Mediterranean is a marvelous source of supply, and the specimens are constantly being added to."

"Wouldn't have missed it for a good deal," remarked Mr. Pinckney trotting up. "We'll have to come here often, youngsters," he nodded to the twins. "When the others are off looking at their old churches and dried up specimens we'll come here and see these fine wet ones, won't we?" And the twins were only too ready to agree to this.

The young men were possessed with a desire to see the castles of San Martino and St. Elmo that afternoon, but started off alone, while the others took carriages and drove about the city, watching the life in the narrow little streets where gay colored flowers on the balconies, and bits of scarlet or blue clothing, hung from the windows, added to the charm of color.

"I think the cool way in which they carry on their household affairs, their trades or anything at all in the streets, is too funny for words," said Jo. "Do look at that old woman cooking macaroni over a handful of charcoal, Nan. Doesn't she remind you of one of the witches in Macbeth?"

"And see that baby with scarce a stitch to cover his dear fat little brown body. And oh, the flowers, the flowers!"

"Nan, Nan, see there's a street with steps all the way up the middle and the donkeys are going up the steps just as easy," cried Jack. "I see a man mending shoes right out on the pavement."

"And a girl with something to sell, something to eat," said Jean. "I wonder what it is."

"Nothing you would like, probably," Nan told her. "Oh, there is a funeral procession. What a queer looking lot of people, and what a gorgeous coffin."