miles off a crate's headin' his way.
Jerusalem crickets! but ain't I glad we're fixed as we are."

The ship far up in the heavens was almost directly over them by this
time and Perk relapsed into silence, being vastly interested in watching
it passing over.

Possibly he had his eyes glued on the figures--there were two occupants
in the Robin's cabin he could easily see--leaning over and doubtless
closely scrutinizing the intricacies of the ragged shoreline below,
hoping to make important discoveries.

If the leading figure, piloting the craft, was actually Oscar Gleeb,
onetime noted Hun ace over in the Argonne, it might be Perk, with his
past war history rising up to thrill him afresh, may have found himself
half expecting to hear a terrific explosion close by on the shore as the
German flier let drop some sort of bomb, with the idea of striking their
concealed bus which his keen eyes might have detected despite their
wonderful camouflage.

But nothing like that came to pass and the cruising ship kept moving in
a northerly direction, growing less distinct as miles were being covered
at the fast clip it swept along.

"Cripes! that was worth somthin' to glimpse, bet your sweet life,
partner," Perk finally observed as he ventured to make a little
movement, feeling dreadfully cramped and the danger of discovery growing
momentarily less as the first shades of coming evening began to gather
around the secluded cove. "Jest as like as not they started away down
toward the tip o' the mainland, an' hev been examinin' every mile o' the
coast, bent on doin' a clean job while they're at it. An' if they meet
up with no luck mebbe now they'll make up their minds it was only a
false alarm, and let her go at that."

Presently they could no longer glimpse the faintest sign of the scout
plane--when last seen it was still heading up the coast as though making
for some destination where action awaited the members of its daring
crew.

"The passing of that crate settles one thing, anyway," observed Jack
presently.

"As what, partner?" queried Perk, who had already begun to denude the
anchored amphibian of its covering, as though it was settled they need
no longer fear being spied upon from above.

"We needn't bother striking into the south when starting out to look for
suspicious lights, such as would tell of business being put
through--those boys are right now heading for their rendezvous and it's
our game to chase after them, as