ing tighter and tighter and pulling downward so heavily that the barrel to which the boy clung was almost totally submerged.
"Save me!" he gasped once more. "I'm going down! It's pulling me under!"
"I'm coming!" answered Dick. "What is it? Can't you make out?"
"Something slippery and slimy. Oh, save me!"
"If it was a devil-fish we'd see something of it," thought Dick, and he dashed in and then under water. In a moment he had hold of Leander's legs and was slashing away vigorously with his knife—at a mass of drifting seaweed!
It was a tough job; but once Dick knew he had not some animal to contend with, or monster of the deep, he grew calmer, and in a minute more Leander was free, and the others were helping him back to the yacht.
Dick brought with him some of the seaweed, which was dark green in color and covered with a whitish slime which gave one a shiver to touch.
Poor Leander was too exhausted to stand, upon reaching the deck, and had to be assisted to the cabin, where he was rubbed down and put to bed.
All on board examined the seaweed with interest.
