The girl in the pink tam-o'-shanter was in the first one.

They glanced at us curiously as they passed, and the P.T.S.--that is the
way we grew to speak of the pink tam-o'-shanter--raised one hand in the
air, which is a form of canoe greeting, probably less upsetting to the
equilibrium than a vigorous waving of the arm.

It was just then, I believe, that they saw our camp and headed for it.
The rest of what happened is most amazing. They stopped at our landing
and unloaded their canoes. Though twilight was falling, we could see
them distinctly. And what we saw was that they calmly took possession
of the camp.

"Good gracious!" Tish cried. "The girls have gone into the tent! And
somebody's working at the stove. The impertinence!"

Our situation was acutely painful. We could do nothing but watch. We
called, but our voices failed to reach them. And Aggie took a chill,
partly cold and partly fury. We sat there while they ate the entire
supper!

They were having a very good time. Now and then somebody would go into
the tent and bring something out, and there would be shrieks of
laughter.

[We learned afterward that part of the amusement was caused by Aggie's
false front, which one of the wretches put on as a beard.]

It was while thus distracted that Aggie suddenly screamed, and a moment
later Mr. McDonald climbed over the side and into the boat, dripping.

"Don't be alarmed!" he said. "I'll go back and be a prisoner again just
as soon as I've fired the engine. I couldn't bear to think of the lady
who fell in sitting here indefinitely and taking cold." He was examining
the engine while he spoke. "Have visitors, I see," he observed, as
calmly as though he were not dripping all over the place.

"Intruders, not visitors!" Tish said angrily. "I never saw them before."

"Rather pretty, the one with the pink cap. May I examine the gasoline
supply?" There was no gasoline. He shrugged his shoulders. "I'm afraid
no amount of mechanical genius I intended to offer you will start her,"
he said; "but the young lady--Hutchins is her name, I believe?--will
see you here and come after you, of course."

Well, there was no denying that, spy or no spy, his presence was a
comfort. He offered to swim back to the island and be a prisoner again,
but Tish said magnanimously that there was no hurry. On Aggie's offering
half of her tarpaulin against the wind, which had risen, he accepted.

"Your Miss Hutchins is reckless, isn't she?" h