Move fast when the time comes.

Tell Tom and Harry when you get a chance, but don't let the Ripley crowd suspect." Dick then found chance to pass the message to Greg and Dan.
Five minutes later Dick sauntered back to the corner of the cabin at the front side.

Dave approached from another direction.

Tom and the others caught the meaning of the move.

Then, all of a sudden, there was a scampering of feet.
"Look out!" yelled telltale Hen.