“How so?”

“I will explain in a nutshell.”

“I’m all attention.”

“For nearly a year, now, Garland has been collaborating with Captain Arthur Backas, a naval officer now stationed in Annapolis, and who also is a recognized expert along engineering lines.”

“I know him by name,” Nick bowed.

“For the past year these two government engineers have been secretly and exclusively at work on plans for elaborate coast-line defenses and fortifications extending from Chesapeake Bay to Sandy Hook. It is one section of a vast and for the most part secret coast-defense system contemplated by the government, and the first steps in the construction of which have already been taken.”

“I follow you, Welden.”

“And you know, of course, that secrecy is one of the absolute requirements in such work,” Chief Welden proceeded. “There is no occasion for me to enlarge upon that. Secrecy is imperative to adequate protection. If other nations were to learn——”

“I know all about that, Welden,” Nick interposed, checking him with a gesture. “It goes without saying. Come to the point.”

“That may be done with few words,” Chief Welden replied. “Last Friday, three days ago, Garland had occasion to confer with Captain Backas about a very important part of their mutual plans, and he went to Annapolis for that purpose.”