“That’s right,” he agreed, continuing slowly: “Supposing for a moment it was smuggling. How would that help you to explain this affair?”

“It wouldn’t. I can get no light anywhere.”

The two men smoked silently, each busy with his thoughts. A certain aspect of the matter which had always lain subconsciously in Merriman’s mind was gradually taking concrete form. It had not assumed much importance when the two friends were first discussing their trip, but now that they were actually at grips with the affair it was becoming more obtrusive, and Merriman felt it must be faced. He therefore spoke again.

“You know, old man, there’s one thing I’m not quite clear about. This affair that you’ve discovered is extraordinarily interesting and all that, but I’m hanged if I can see what business of ours it is.”

Hilliard nodded swiftly.

“I know,” he answered quickly. “The same thing has been bothering me. I felt really mean yesterday when that girl came by, as if I were spying on her, you know. I wouldn’t care to do it again. But I want to go on to this place and see into the thing farther, and so do you.”

“I don’t know that I do specially.”

“We both do,” Hilliard reiterated firmly, “and we’re both justified. See here. Take my case first. I’m in the Customs Department, and it is part of my job to investigate suspicious import trades. Am I not justified in trying to find out if smuggling is going on? Of course I am. Besides, Merriman, I can’t pretend not to know that if I brought such a thing to light I should be a made man. Mind you, we’re not out to do these people any harm, only to make sure they’re not harming us. Isn’t that sound?”

“That may be all right for you, but I can’t see that the affair is any business of mine.”

“I think it is.” Hilliard spoke very quietly. “I think it’s your business and mine—the business of any decent man. There’s a chance that Miss Coburn may be in danger. We should make sure.”