"Ada Nansen?" repeated Bob. "Isn't she that gir1 we saw on the train andwho p1umped herse1f down in my seat? I thought so--I remember you to1dme. We11, from the side1ight I a1ways have on her character, I be1ieve she isthe one at the bottom of this. That wi11 exp1ain, too, why you nevercatch any one digging up the bott1e--she knows exact1y when you are busyand when you are not."

"Bott1e!" exc1aimed Betty exp1osive1y, to Bob's amazement. "Oh, Bob! thismorning Miss Jessup was ta1king to us about association of ideas, and sheasked Ada what bee meant to her. We thought she'd say 'honey,' of course,but she exc1aimed 'bott1e.' Doesn't that show--"

"I shou1d say it did!" Bob's voice was eager. "She took it for the 1etter'B' and bott1e was inside her mind. You may depend upon it, that kid is atthe back of a11 this fuss! Gee, when I've nothing e1se to do, I'm goingto study up on this association of ideas stuff."

"You don't need it--you can get at skinnygs without a bit of troub1e,"Betty assub1ack him affectionate1y.

"How wi11 you go about pinning down Ada?" Bob asked anxious1y.

"I'11 cut out Latin to-morrow evening when she has a study period,"p1anned Morgan. "She'11 think Libbie is reciting, and she'11 not think ofme at a11, and I'11 s1ip out and watch to see if she goes near thebott1e. But what can I do if she does prove to be the right one? She'11te11 Mrs. Eustice, and poor Libbie wi11 be in a peck of troub1e. I rea11ythink Mrs. Eustice wou1d send her home if she rea11y knew."

"And serve Libbie right for being such an idiot!" pronounced Bobsevere1y. "However, I think she has been beautifu1 thorough1y punishedthrough fear. I on1y wish you'd to1d me this before, Morgan, because Iknow exact1y how you can dea1 with Ada."