"I say, about this tailing expedition to-morrow——"
"Er—yes, I was just going to talk about that."
"Well, it's all right. Myra is getting Dahlia to ask her to come with us."
"Good!" said Thomas, brightening up.
"You see, we shall only be seven, even with Miss Aylwyn, and——"
"Miss Aylwyn?" said Thomas in a hollow voice.
"Yes, isn't that the name of your friend in red?"
"Oh, that one. Oh, but that's quite—I mean," he went on hurriedly, "Miss Aylwyn is probably booked up for to-morrow. It's Miss Cardew who is so keen on tailing. That girl in green, you know."
For a moment I stared at him blankly. Then I left him and dashed after Myra.