Harry got into the sailboat along with the kicker and remained there.
Old King Brady, Alice and the other two Secret Service men ascended to the bulkhead.
Such boxes and opium bales as were piled on the larger box were transferred to the launch, and a rope made fast around the box, which was then hauled up, but not without considerable difficulty, and carried in front of the first warehouse of the row, where it was placed on the board platform.
Alice now called again to the imprisoned princess, but received no answer.
"I'll be blest if I see how we are ever going to get this thing open without a screw-driver," grumbled one of the Secret Service men.
"I can supply that want," replied the old detective, who usually has a few tools concealed in some of the many pockets of that wonderful blue coat.
He hastily produced it and went to work.
The screw-driver was not only a small affair, but the blade folded into a slot in the handle.
The joint being loose, it made the tool wobbly.
Old King Brady soon discovered that he had attempted the impossible. He could not start a single screw.
"This is a bad job," he exclaimed. "We shall have to lower the box again. I greatly fear that we are up against a murder case. If the woman was alive, she would surely have revived before this."
"She said she was dying," replied Alice. "It begins to look as if she spoke the truth."
"Get back to the boat," called Harry. "We may as well run around to the India Basin warehouse. We shall be able to open the box there."
"I see no other way," replied Old King Brady, and once again he started to make fast the rope, when suddenly Harry called that he could hear the sound of oars.
"Which way?" demanded the old detective.
"Up the channel. Don't seem to be far off, either."
"Come, boys," said Old King Brady, "we'll sneak along the bulkhead and see who it is. Crouch low, now. If it is the Chinamen prowling about, we may be able to bag them. Alice, you better go aboard the launch."
"I'll stay here and watch the box," replied Alice.
The old detective and the two Secret Service men now crept along the line of the bulkhead with their revolvers drawn.
Alice quickly lost sight of them in the fog, which was now thicker than ever.
"Alice, are you all right up there?" called Harry.
"Of course," she replied. "Why not?"
"I wish you would come down."
"And abandon my imprisoned princess? I won't."
Harry and Alice are lovers, and practically engaged.
Long ago they would have been married if Alice would only consent to give up her work.
But Alice is perfectly fascinated with the life of a detective, so the marriage day is forever being postponed, for Harry insists that Alice shall give up the business before becoming his wife.
But even under their present relations he sometimes tries to force her to yield to his ideas more than she cares for, although he has long ago learned that she is a difficult person to drive.
Harry knew by her tone now that Alice had made up her mind to stay just where she was, so he let the matter drop and was sitting in the launch in silence when suddenly a shot rang out.
It was followed by another, and others still.
Then Old King Brady shouted something in the distance, but Harry could not make out what he said.
"Alice!" he called, "can you hear what the governor is saying?"
There was no answer.
"She don't seem to hear you," observed the kicker.
"Alice!" shouted Harry again.
Still no answer.
"Can she have gone forward to see what that shooting is about?" he exclaimed. "It would be just like her. I'm going up to see."
"I hear somebody running," cried the kicker.
Just then Old King Brady was heard calling out:
"Lay for them, Harry! Chinks in a boat! Coming your way!"
Young King Brady listened, catching the sound of oars.
But it was only for a minute.
"They have either stopped or muffled their oars!" he said when he heard Old King Brady right above him exclaim:
"Good heavens! What's this?"
"Anything the matter with Alice?" cried Harry, and he went up the standing ladder flying.
Old King Brady was peering about in the fog.
The two Secret Service men were just coming up.
"What is it?" cried Harry. "Where's Alice? I have called her several times, but she don't answer."
"Why, I left her right here, and that box with her; both seem to have vanished," Old King Brady answered in a tone which fully betrayed his anxiety.
But it was easy to mistake the exact position in the fog.
A moment's search revealed the puzzling fact that nowhere on the bulkhead Alice and the heavy box containing the imprisoned princess was to be found.
The Bradys and the Secret Service men pushed about everywhere.
One of the first things they did was to turn the corner of the end warehouse and look there along the street.
"She has been captured and carried off. She must have gone this way," Harry exclaimed.
"Or into one of the warehouses," said Old King Brady.
"I'll get up the street. You get along by the warehouses," cried Harry, and he started away on the run.
It was ten minutes before he returned.
"Learned anything?" demanded Old King Brady, anxiously.
"Nothing. I went two blocks. Didn't see a soul; no need to ask you if you had better luck, I suppose?"
"I had none at all. I have tried the different doors, but I can't find any that is open now, whatever the case may have been a few minutes ago."
And such are the circumstances of the most mysterious disappearance Alice has ever made, and she has made many, for, of course, troubles form a part of the life of a detective.
Poor Harry was in despair. Old King Brady exceedingly anxious and also vexed with himself to think that he had not insisted upon Alice going aboard the boat.
"And you heard no noise of any kind?" he asked for the third time.
"Not a sound," replied Harry. "I was sitting quiet in the boat, too."
"When was the last you heard her speak?"
"Just before the firing began. Was it you who fired?"
"We fired back at three Chinamen who fired on us from a boat."
"Sailboat – rowboat?"
"Rowboat. Didn't you hear the sound of oars?"
"Yes, yes! I am so rattled that I hardly know what I'm saying. What on earth shall we do?"
"We have to look after our captured opium, too. You remain here, Harry, and Leggett can stop with you. I'll run the stuff around into the India Basin and make sure of it. Don't you go doing the disappearance act now."
"Same to you, governor. Oh, these Chinks! I wish we might never have another mix-up with them."
Old King Brady made no reply, but hastily descended to the launch, which towed the captured sailboat to a bonded warehouse on the India Basin, where Secret Service men were waiting to receive them.
It was daybreak before he got back to the Islais Creek Channel again.
The fog had vanished with