The last one of the quartette was Amy Blackford, quiet and retiring, but
given to occasional outbursts which never failed to surprise and delight
the girls. The mystery which at one time had surrounded her origin had
been cleared up some years before by the finding of Henry Blackford, her
long-lost brother.

How the girls formed a camping and tramp club and the fun they had on
their interesting and adventurous tour, has been told in the first volume
of the series, entitled "The Outdoor Girls of Deepdale."

After this the girls had many adventures, first at Rainbow Lake, to which
they went on another tour, this time in an automobile. From there they
went to a winter camp where they had many varied and exciting experiences
on skates and iceboats. Then followed a glorious trip to Florida, where
the girls braved many dangers and took thrilling trips into the wilds of
the interior.

Their next adventure took them to Ocean View and centered about a
mysterious box they found in the sand.

Then followed that glorious trip to Pine Island. An aunt of Mollie
Billette had turned her bungalow over to the Outdoor Girls for the summer.
During their strenuous adventures the girls had made many friends among
the boys and young men of Deepdale, and four of these had asked and been
granted permission by the girls to accompany them to Pine Island and pitch
their camp in the woods near by.

One of the young men was Allen Washburn, a rising young lawyer and a great
admirer of Betty. Another was Will Ford, Grace's brother, and a third was
his high school chum, Frank Haley. The fourth, Roy Anderson, had been