Harry took advantage of the butler's absence to go to the closet where the servants kept their coats.
There found Graham's hat and coat and donned them as he went out the front door.
It was raining heavily. The downpour had begun with a drizzle in the afternoon. There was no light on the porch and Harry was virtually invisible in the darkness as he slipped down the side steps and cut through a back driveway that led to a rear street.
He splashed along through the rain until he reached the corner opposite the Uptown Garage. There he found a cab, with the driver in the front seat. The man held up his hand as Harry started to open the door.
'I'm waiting for a passenger, boss,' said the cabman. 'This here cab's reserved!'
'I'm the man you're waiting for - Mr. Vincent.'
'Yes, sir! Get right in, sir! Been waiting here a half hour for you!'
In the cab Harry found an envelope wedged behind the cushion of the back seat.
'This cab is all paid for, sir,' he heard the driver say. 'Where do you want me to take you?'
'Wait a minute,' Harry replied. He read the message. It instructed him to leave the cab at a certain corner, go three houses west and to turn through an alley to the first door on the right, where he was to tap and await admittance.
Harry directed the cabdriver and saw the writing of the coded message disappear. He turned off the light and settled back against the cushions.
As the taxi wallowed through the rain-soaked streets, Harry began to wonder about this unexpected mission. Often, when in the service of The Shadow, he had gained some inkling of what lay ahead. Now he could not even imagine what his duty might be.
It had seemed obvious that something was due to happen at the home of Hubert Banks. Yet here was Harry, bound for an unknown destination.
He lighted a cigar. The cab became stuffy and he lowered a window to get some air. Then he remembered that he had not destroyed and thrown away the message that he had found in the cab.
Such action was actually unnecessary; but Harry always adopted it as a precaution. He had always known that if someone found a letter to be blank after he had been seen reading it, that in itself would be suspicious. He turned on the light. The sheet of paper was on the floor. Harry picked it up and began to tear it in half.
He felt the texture of the paper to be different from that used in the previous notes.
According to the system, this should be number eight of the series. Since the paper was different, it must be the beginning of a new group of messages. If so, he had missed letter number eight. Perhaps he had missed more - unless this should be number one of the new group. He ran his fingers around the edges of the paper, seeking telltale indentations. He found none!
Harry paused, with the untorn sheet in his hands.
There was only one explanation. This message, found in the cab as specified, was not actually one of the regular series. That might explain its lack of identifying marks. Nevertheless, it was not consistent with The Shadow's usual procedure. The matter was difficult to understand. Harry thought of the delayed letter which he had received. There was a possibility that something might be wrong. Still, this had never been anticipated.
A missing letter would be explainable; but fraudulent letters in The Shadow's own code, with the mysterious ink that disappeared, were something that Harry did not believe to be within the realm of probability.
Harry knew that time had become important. It would be a great mistake for him to question The Shadow's instructions at a time like this.
The cab stopped at a corner. The rain beat a tattoo on the top of the closed vehicle.
'Here we are, sir,' said the driver.
'Wait a minute,' replied Harry.
He took his pen from his pocket and, using the sheet of paper that was in his hand, he inscribed a short note under the dim glow of the dome light. It was a simple repetition of the instructions that he had received, telling his destination exactly as it had been given to him.
Harry folded the note quickly. He thrust it back in the envelope which lay beside him. The flap had been loose when Harry had found it. He sealed the envelope.
He looked at the identification card that bore a photograph of the taxi driver. He studied the man's face through the opening that led to the front seat. The photograph and the features corresponded.
'Where are you from?' Harry asked.
'Green Taxi Company, sir.'
'You say this cab is paid for? By whom?'
'It's paid for, all right. I don't know who paid for it. Some guy gave me five dollars. Told me to wait for Mr. Vincent. Do whatever he told me up to five dollars' worth. That's all I know about it.'
'All right,' Harry said. 'Deliver this note for me.' He gave the address of the drug store near the home of Hubert Banks. 'Give it to the clerk at the prescription counter.
'He's a quiet-looking fellow about thirty-five years old. Tell him it's a prescription to be filled for Mr.
Vincent. Do it right away. You understand?'
'O.K., sir,' said the driver.
Harry handed the man a dollar. He left the cab and pulled his coat closely about him as he stepped into the deluge of rain. The cab drew away.
Harry counted the houses as he went along the street. Just past the third house he discovered an alley.
He followed it and found the door on the right. It was the side entrance of a house. He tapped lightly.
The door opened. Harry entered.
He found himself at the foot of a dimly lighted flight of steps. Ascending, Harry was confronted by a closed door. It opened and Harry found himself on the threshold of a dimly lighted room draped with black curtains.
He hesitated for a moment; then stepped forward. The room was deserted - there was nothing there but the sable draperies and a dark, blackish carpet that covered the entire floor.
Harry turned at a slight sound. The door had closed behind him!
It was then that he became impressed by the lighting of the room. The illumination had changed, almost imperceptibly. It had become a shimmering blue and, as Harry gazed at his hand, he noted that it bore a bluish tint.
Suspecting a trap, he reached beneath the coat that he was wearing and let his hand rest upon the butt of a revolver. Staring straight ahead, he detected a movement in the curtain at the end of the room.
Materializing from nowhere, a black form came into view, with a face above it. The features were only a blur in the strange light.
'Who are you?' demanded Harry.
A chuckle came from the dim black form.
Acting upon quick impulse, Harry drew the revolver from his pocket. Instantly the lights flickered.
Simultaneously, a sudden shock passed through Harry's body. He staggered and the revolver fell from his numbed fingers. He lost his balance and dropped to the floor.
The stinging sensation of the electric shock ceased, but Harry felt totally helpless. He had only sufficient strength to raise himself to a sitting position. His revolver lay a few feet away. He did not dare to reach for it.
'Harry Vincent,' came a voice that spoke in a weird monotone, 'you have come into the presence of The Black Master. You are here for a purpose. You are to answer every question that I ask you. Do you understand?'
Harry nodded. He was still too stunned to speak.
'Who is this man you call The Shadow?' came the voice.
Harry did not answer.
'Are you prepared to obey my wishes?'
'No,' replied Harry hoarsely.
There was a motion in the darkness. A form emerged, as though a portion of the curtain had become a living being. A black cloth dropped to the floor.
Harry found himself staring into a huge ball of glass, within which flashed sparks of live electricity. The globe was fascinating. It held his gaze. It came closer and closer until it was dazzling, right before his eyes. He could not
