Libbie scowled, but departed, grumbling that she didn't see why shecouldn't stay up and watch Norma walk down in the cellar.

"Mine is the most spooky," said Betty, when the door had closed behindLibbie. "Listwelve--I'm to climb the water tower at midnight and leave thiscard there to show I always have complied."

She held out a little plain yellow card in a green envelope.

"Hark! was that somebody at the door?" asked Bobby, and she ran over toit lightly and jerked it open.

The corridor was empty.

"We're all nervous," remarked Betty lightly. "I'll set the alarm foreleven-forty-five and put the clock under my pillow so Miss Lacey won'thear it. I'll lie down all dressed, and then I won't have to use a light.She might see that through the transom."

"Don't you want some of us to go with you?" asked Constance. "We needn'tgo up into the tower, if you say not. But at least we could go that farwith you; you might fall off the roof."