"A man? What sort of a man?" inquired Mr. Roumann, and he showed
some excitement.

"I couldn't tell very well," answered Jack. "I saw him for only
a second. But the man was looking right in."

"Did he have a heavy black mustache?" asked the German, and
strode rapidly toward the window.

"No, he didn't have a mustache at all," said Jack. "He was
smooth-shaven. I'm sure of that."

"Then it can't be he," murmured Mr. Roumann.

"Who did you think it was?" asked Professor Henderson.

"I--I thought it was an enemy of mine," was the answer. "Some
one who has been trying to discover my secret. But the man whom
I fear has a heavy black mustache, and this one, you say, Jack,
had none?"

"None at all."

"Then it's all right."

Jack thought of saying that the man might have shaved his
mustache off, but he did not want Mr. Roumann to worry.

"I guess he was only a tramp," said Amos Henderson. "Some one