to be the German Ocean, and a piece of stout cord was to serve as a submarine cable.
The boy and girl were well-matched playmates, for Madge was ignorant and receptive—in reference to science,—Robin learned and communicative, while both were intensely earnest.
"Now, this is the battery," said Robin, when he had dug a deep hole close to the pool with a spade brought for the purpose.
"Yes, and the muddy water in it will do for the mixture of acid and water," said Madge.
As she spoke, Robin's toe caught on a root, and he went headlong into the battery, out of which he emerged scarcely recognisable. It was a severe, though not an electric, shock, and at first Robin seemed inclined to whimper, but his manhood triumphed, and he burst into a compound laugh and yell, to the intense relief of Madge, who thought at first that he had been seriously injured.
"Never mind, Madge," said Robin, as he cleansed his muddy head; "cousin Sam has often told me that nothing great was ever done except in the face of difficulties and dangers. I wonder whether this should be counted a difficulty or a danger?"
"At first I thought it a danger," said Madge, with a laugh, "but the trouble you now have with the mud in your hair looks like a difficulty, doesn't it?"
