The Shadow had seen that envelope in Cardona’s office. Strangely enough, its scrawl coincided exactly with other envelopes that The Shadow had found in this apartment last night!
Those envelopes were in the hiding place by the window, where The Shadow had discovered and replaced them.
What was The Shadow’s purpose?
Only time could tell, but the soft, sinister laugh that echoed now was the forerunner of some clever scheme.
The Shadow’s work was now completed. The softly moving form swished from the workshop.
It traveled to the outer door, and made its exit from the stairway. The Shadow was seen no more that night.
But his voice was heard by one who had not expected the sound of those weird, whispered tones!
AT headquarters, Joe Cardona was puzzling over the facts of the Throckmorton death, trying vainly to link them with the other killings.
Within twenty-four hours, another letter would be on its way, announcing one more death!
The telephone rang.