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Rh going to turn out to be a country estate, and not just a farm. We ought to find a gate somewhere further along."

"That crying has stopped, Tom."

"For the time being, yes," admitted the other. "Perhaps she's only gone away from the open window. I was in hopes it would keep on, so we could be guided straight."

Two minutes later, after walking alongside the high fence for some distance, they discovered the entrance to the place. Tom flashed his light on the ground.

"Been considerable going in and coming out of vehicles, generally automobiles," he announced.

"And private cars are almost taboo in all Germany these dark days, they tell us," mentioned Jack sagely. "That makes it look as if some sort of military business might be transacted in this isolated place. Gee! I tell you it's getting my curiosity whetted to a fine point, all this mystery. But we're going in, of course, Tom?"

"Some way or other, Jack. If the entrance is closed and locked we can climb over the fence, all right. But no need of worrying about that, because I already see the gates are ajar. Come on."

So they slipped into the enclosed grounds,