Mr. Carlyle laughed a little to cover an involuntary movement of
surprise.

"There is a suggestive line that was not touched at the inquiries," he
admitted. "Hutchins has been a saving man all his life, and he has
received good wages. Among his class he is regarded as wealthy. I
daresay that he has five hundred pounds in the bank. He is a widower
with one daughter, a very nice-mannered girl of about twenty. Mead is
a young man, and he and the girl are sweethearts--have been informally
engaged for some time. But old Hutchins would not hear of it; he seems
to have taken a dislike to the signalman from the first, and latterly
he had forbidden him to come to his house or his daughter to speak to
him."

"Excellent, Louis," cried Carrados in great delight. "We shall clear
your man in a blaze of red and green lights yet and hang the glib,
'greasy' signalman from his own signal-post."

"It is a significant fact, seriously?"

"It is absolutely convincing."

"It may have been a slip, a mental lapse on Mead's part which he
discovered the moment it was too late, and then, being too cowardly to
admit his fault, and having so much at stake, he took care to make
detection impossible. It may have been that, but my idea is rather
that probably it was neither quite pure accident nor pure design. I
can imagine Mead meanly pluming himself over the fact that the life of
this man who stands in his way, and whom he must cordially dislike,