“That doesn’t sound too hard,” interrupted Sally.
“It’s simple. Take this book home and learn the numbers. Then listen to your radio and try to write down the ‘put-puts’ in dots and dashes.”
“I will if they are there tonight. Sometimes they’re not there at all and sometimes there are a lot of them, five, six, or a dozen, all talking to one another like frogs in a pond.”
“Is that right!” He suddenly became excited. “Say, perhaps they are in a pond, the big pond. Perhaps they are wolves instead of frogs.”
“Wolves?”
“Sure, enemy subs, wolf-packs of them, you know. Wouldn’t that be a break?”
“I—yes, I suppose so.”
“You suppose so! Say! You don’t know the half of it! These wolf-packs are known to have some means of talking to one another under the water.”
“They’d almost have to.”
“Sure they would, but all the bright minds in Europe and America can’t find out how they do it.