"No, you're merely the one particular kind of fly our particular kind of fish will rise to. I mean by that, Sadie, that if our man sees your sign, or stumbles across your newspaper advertising, it's reasonable to assume he'll come out of hiding and try to have a talk with you."
"I don't quite git that!" objected Sadie.
"You're his friend of other days," explained Wilsnach. "You were his adviser before he went under cover."
"Then why'd he go under cover?"
"Because ten days ago when he was fired from the Sinclair Steel Plant he stole a bundle of chart plans of one of our Navy boats. That boat's our new long-cruising submarine known as the Carp-Mouth Submersible. It's called that because it has a system of air-valve ejectors for mine-laying and a perfected mechanism for taking on fresh supplies along the sea-bottom. That gives it a ninety-day cruising radius without any need of returning to its base, in time of war. Dorgan got those plans. In the same bunch he also got the new Dupont magnetic detector, for indicating under water the approach of any ironclad. They were all plans and specifications
