prime movers of the Scout invasion of Hiawatha Institute.

But the next letter was the real thriller, or rather cold chiller. She
knew very well what it meant. From the point of view of the writer it
meant "business," a threat well calculated to work terror in her own
heart and the heart of every other member of Flamingo Fire. It was a
threat couched in direful words, warning her and her friends not to go
to Hollyhill on their charity mission, as announced, and predicting
serious injury if not death to some of them. It was signed with a
skull and cross-bones.

* * * * *




CHAPTER IV.

STUDYING THE MYSTERY.


Is there any wonder that Marion Stanlock, after reading letter No. 2
was seriously in doubt as to whether No. 1 was from the Scouts who had
promised another surprise for the Camp Fire Girls in the near future?
Judge for yourself--here is No. 1:

Something Doing Soon
Look Out
SOMETHING DOING SOON
LOOK OUT