“Paying attention to their work,” said Josh sharply, “and that’s what you’re not doing.”

“I’m only a few fathoms behind you, Josh, and I shall be waiting directly. I say, when we’re done let’s row aboard.”

“I don’t want to row aboard,” said Josh sourly, but watching the progress of the boat the while.

“They’ve got regular diving things there, Josh, and an air-engine; and the men go down. I should like to have a look.”

“What are they going down for?” said Josh; “looking for oyster-beds?”

“No, no. Trelynn Mine is like to be flooded by the water that comes in from one of the galleries under the sea, and the divers go down to try and find the place where it gets in, and stop it with clay and cement.”

“Humph! are they going to find it, d’yer think?”

“Yes, I believe so. They measure so exactly that they can put a boat right over the place. I say, Josh, shouldn’t you like to go down?”

“What! dive down?”

“Yes.”