“Messenger just brought a message for you, Mr. Vincent,” came the voice over the phone.

“Send it up,” replied Harry.

He hurriedly donned bath robe and slippers while he awaited the message. Harry knew what the note would mean. New action — new work — in behalf of the mysterious Shadow.

For Harry Vincent was a young man who had experienced many adventures. He had one occupation in life: to do The Shadow’s bidding.

He lived a life of leisure, well supplied with money that came from an unknown source; but on occasion his idleness was interrupted by orders from The Shadow.

Then it was his duty to respond; to face unforeseen dangers; to aid The Shadow in his activities.

Who was The Shadow?

Harry Vincent did not know.

Time and again the hand of The Shadow had intervened to save him from danger or death. He had seen The Shadow in disguise; he had seen him as a tall, black-clad figure that appeared and vanished in the darkness of night; but he had never seen The Shadow’s own face.

A bell boy arrived with the message. Harry dismissed the attendant; then he opened the envelope, and scanned the sheet of paper that it contained.