g, low
whistle.

"Oh! what is it? Tell me!" pleaded Myra, anxiously.

"It's a photograph of our friend Fuller," I replied slowly, in a voice
that shook with excitement. "And he's wearing court dress, and
underneath the photograph are the words 'Baron Hugo von Guernstein,
Secretary of the Military Intelligence Department of the Imperial
German General Staff.'"

CHAPTER XVI.

DISCLOSES CERTAIN FACTS.

"There's no doubt about it," I remarked as soon as we had partially
recovered from our surprise. "That's Fuller right enough."

"Oh! there's no doubt it's our man," said Dennis emphatically. "Even
if we had not the evidence of the torn page to corroborate it, the
likeness is perfect."

"Yes," I agreed, "but what do you think his game can be? I'm coming
round to Garnesk's wireless theory."

"Whatever it is, we've stumbled on something of real importance this
time. We must find out what it is and show it up at once."

"I hope you'll take care," said Myra anxiously. "I shouldn't mind so
much if I could be with you to help, but it's dreadful to sit here and
know you are in danger and not be able to do anything at all."

"I'm very glad you can't, darling," I said heartily, as I threw my arm
round her shoulders. "I don't want you to come rushing into these
dangers, whatever they may be. In a way I am glad you are not able to
join us, because I know how difficult it would be to stop you if you
were."

"I suppose this is all one affair," she said doubtfully. "You don't
think this is something quite different from the green ray? It might
be two quite separate things, you know."

"I don't think we are likely to meet with two such interesting
problems in such a remote locality unless they are connected with each
other, Miss McLeod, and especially as everything else apart from the
photograph of Baron von Guernstein points to Fuller as the culprit. I
think we can take it that in solving one mystery we provide the
solution to the other."

"I quite agree with you, Dennis," I said, "but what I am worrying
about now is, what we are going to do."

"The first thing you must do is to dress for dinner, and not let
anyone imagine there is anything untoward about," Myra advised. "And
please don't tell father you have been lunching with one of the
Kaiser's principal spies, if that's what the Baron's title really
means. I would much rather you said nothing to him at all about it for
the present, and in any case you must h