"Of course. Who else could it be?" said Billie, trying to make her voice sound natural when the skin on the back of her neck was beginning to crawl. "For goodness sake, don't let them think you're scared, whatever you do," she whispered fiercely, as the first of the white-draped figures reached the woods. "That's probably just what they're trying to do."

The leader of the "ghosts," as they had already dubbed them in their minds, came to a halt just a few feet in front of the chums, and her followers drew up behind her.

Then they stood there, motionless as the trees around them, looking at Billie and Laura and Vi through those ghastly white masks until the girls thought they must scream.

They afterward found out that this was the "silence test," that unless the girls pa.s.sed this first test they were unworthy to belong to the "Ghost Club." And pa.s.sing the test consisted of doing what the girls were doing now--although they did not know it--just standing still and waiting for the head "ghost" to speak.

And finally, when the girls felt that they could no longer stand it but must dash out of the dark woods and away from the ghostly, motionless figures, the "head ghost" spoke.

"We have come," it said, "to ask you a question."

There followed another silence, and Billie, not knowing just what was expected of her, but wishing to be polite, said, rather weakly: "Yes, ma'am."

For a minute it looked as if the meeting would be broken up, for who could be dignified and ghostly when addressed as "ma'am"? There was a giggle from among the ghosts, and one or two of them began to double up as if with silent laughter. But once again the head ghost lifted its hand, or what looked more like a wing, under the sheet and her followers straightened up.

"And that question is," said the head ghost in a voice not quite so solemn as before: "Do you believe in ghosts?"

This was a poser. The girls never had believed in ghosts, but how could they say so to this white-clad group. They had either to tell a fib or offend their visitors. Billie, acting as spokesman, chose the fib.

"We never used to," she said, and for the life of her she could not keep the laughter out of her voice, "but I think we shall after to-night."

"Ah," said the head ghost softly, and it seemed as if there were a little stir in the group behind her. "Then come closer for I would ask you yet one other question."

Obediently the chums came closer,--although they would much rather have stayed where they were--and the head ghost put her second question.

"Listen," she said solemnly, lowering her voice at least two degrees more. "Listen well, for it is a matter of great import. Would you be one of us?"

In the silence that followed the girls could almost hear their hearts beat. This was the secret society to which every girl in Three Towers longed to belong, and they, Billie, Laura, Vi, were being asked to join.

The last question of the head ghost could mean nothing else.

They hesitated a moment, too dazed to answer, and the head ghost repeated its request.

"Would you be one of us?" it asked. "Answer quickly--yes or no?"

Billie took a chance on her chums and took the plunge.

"Yes!" she answered breathlessly.

"Ah, 'tis well," came in solemn tones from the white mask of the leader.

Then she waved her arm toward the white-clad figures behind her and the latter moved up till they were close to her.

"You understand," said the leader then, "that one cannot change from a human to a ghost in a minute. There are different stages to be gone through. Spider!" She lifted her hand again and one of the girls separated herself from the group and came forward. As she faced the leader she shivered as if with a chill, raised her hands in the air, and, still shivering horribly, lowered them to her sides again.

The girls learned afterward that this was only a sort of salute which every member of the "Ghost Club" was supposed to give its leader.

But here at night, with the wind sighing through the trees, and weird shadows all about, the thing looked so uncanny that once more the girls had a wild desire to run away and hide.

"What is it, your Ghostship?" asked the one addressed as Spider, and although the voice was disguised the girls were sure it belonged to Connie Danvers. They began to feel more at home.

"Tell these humans," the head ghost ordered, "what they will have to go through to be initiated into the Ghost Club. Come forward, one at a time."

"But would it not be better to show them?" asked Spider, and this time the girls were sure it was Connie.

"Show them, by all means," said the head ghost, and then the girls knew they were in for it.

They had heard of initiations before and what ridiculous things the girls and boys who were lucky or unlucky enough to be initiated had to go through with. But in every case they had heard of the clubs and fraternities had been human ones. The initiation into a ghost club was sure to be much worse.

The leader of the ghost club raised her hand again, and three girls sprang forward from the group behind her. Before the girls knew what was happening to them they found their hands pinned behind them while huge sheets were flung over their heads.

The girls that were doing all this to them tied something that felt like ropes around their waists, pulled the sheets into shape and the girls found to their great relief that there were eye and nose and mouth holes similar to those in the strange robes worn by the ghosts themselves.

After that they went through strange and weird experiences that they remembered in their dreams for a long time afterward.

They were taught the "shiver salute," bandages were tied over their eyes, or rather eye holes, and queer, slimy crawly things were pressed into their hands.

They were forced to swallow things that felt like particularly fat and squirmy worms. It was no wonder that the stomachs of the girls threatened to turn inside out. Several times they were on the point of revolt, but always they choked back protests and did as they were told.

For to have come so near being members of the secret society of Three Towers and then to lose out at the last minute because they had not nerve enough to go through with the initiation, would have been real tragedy. So they gritted their teeth and went ahead.

At last it was over, the bandages were taken off their eyes, and they were led before the head ghost to take the final oath of allegiance when a strange thing happened.

Billie, happening to glance through the trees to the bright patch of lawn beyond, uttered a startled cry. For across that bright patch of lawn a man was running, crouched and furtive.

"Girls!" she cried, forgetting the club, forgetting everything but this new and startling fact. "Look! Quick! Here, through the trees!"

They crowded behind her, stirred by the note of excitement in her voice, straining their eyes in the direction she had pointed out.

The man was just about to enter the shelter of the woods when the snapping of a twig under Laura's foot caused him to stop and look about him, startled.

In that brief second the moon shone full upon his face, and with a start of sheer amazement Billie recognized him.

"It's the 'Codfish'!" she cried. "Girls, it's the 'Codfish'!"

"The Codfish?" they repeated in excitement, and Laura shook her arm wildly.

"Billie, are you sure?" she asked, then gave a gasp of amazement and dismay.

For Billie, forgetting how ridiculous she must look in her ghostly garb, had started in pursuit.

"She's crazy!" cried the "head ghost," speaking this time in the voice of Rose Belser. "Some one go after her quick and get her back. Suppose one of the Pickles should see her from the house!"

But before she could finish Laura was racing like mad after her chum.

Billie had stopped at the edge of the woods and was listening for some sound that might tell her in what direction the man had disappeared.

Laura grasped the sheet that enfolded Billie and tugged at it wildly.

"Billie, come back, come back!" she cried. "We may be seen from the house any minute."