“Do we have to stay up all night to finish it?” asked Helen, innocently.

This brought forth a wild shout.

“The moon doesn’t overlap the sun, Nellie dear,” answered Cleo. “We will probably leave off picket duty when the sun gets behind that hill.”

Peg number two was driven in at exactly two o’clock, and the shadow was so clearly outlined everyone thought this an ideal method of keeping time; but later the shadows were shifty, and only an amount of patience and much running back and forth put the three most important hours of the afternoon in the dial.

“I am going to start again early in the morning,” declared Grace. “I saw a sun dial in a Chicago park, it was made of those queer tiny cabbage flowers, the kind they say keeps the house from getting on fire, and I remember how effective it was.”

“Did they use them to keep the park from getting on fire?” taunted Cleo. But Grace was making sure that nothing unforeseen would happen to the pegs left over from the hours already “pegged in.”

“Won’t have to wind it——” she told the others.

“But I should hate to have to catch the Black Hawk boat by its silent system,” confessed Julia.

[CHAPTER XVI—A DARING INTRUDER]

Summer was at its height now, and so popular had the camp idea become that friend after friend just called, or paid visits to the Bobolinks, who in turn were as generous with entertaining as their limited quarters permitted.