I went to the janitress and asked her if she had noticed any one in the corridors before halfpast one.

That was about the time that people began to come, you know.
She said she hadn't.

She was down in the basement and didn't go near the upstairs classrooms until after two o'clock.

But when she did go up there she found this." Anne held up a curious scarab pin that Grace immediately recognized.

It was one that Miriam Nesbit often wore, and was extremely fond of.
"It's Miriam's," gasped Grace.