"Same thing, I hope," muttered Eph Somers.
After some minutes more Jacob Farnum stepped down below.
"Why, it looks cozy here at night, doesn't it?" he called.
At sound of his voice the boys stepped out of the engine room into the cabin.
"Mighty comfortable sort of place," continued the yard's owner, looking around him. "We'll have to put in some books, won't we, so you young men can read when you're doing nothing under water?"
"Maybe the time will come when we can read," laughed Hal. "Just now, sir, I'm afraid we're too busy with thinking and wondering."
"I'll confess to being a bit nervous myself," responded Mr. Farnum. "Somehow, there's something uncanny about rushing through the depths of the ocean in this fashion, not having any idea what danger you may be close by."
"Such as running into the hull of some big liner that draws more than forty feet of water," hinted Jack.
"We're fifty-eight feet below, now," remarked Mr. Farnum. "You didn't guess that, did you? We sank eighteen feet more, on an even keel."
"Gracious! You meant those eighteen feet, didn't you? It wasn't accident?" gasped Eph.