really lost it."

I wondered whether Langhorne might not, after all, as Kennedy had
hinted, have concealed it elsewhere. The activity of Dorgan and
Murtha might indicate that they knew more about the robbery than
appeared yet on the surface. Had they failed in it? Had they been
double-crossed by the man they had chosen for the work, assuming
that they knew of and had planned the "job"?

The safe-breaking and the way Langhorne took it had served to
complicate the case even further. While we had before been
reasonably sure that Langhorne had the book, now we were sure of
nothing.




IV

THE ANONYMOUS LETTER


"What do you make of that?" inquired Carton half an hour later as
he met us breathlessly at the laboratory.

He unfolded a letter over which he had evidently been puzzling
considerably. It was written, or rather typewritten, on plain
paper. The envelope was plain and bore no marks of identification,
except possibly that it had been mailed uptown.