When they got into any trouble, left a sign of question mark.

We would leave a clear sign for them to follow.

It did go well, and no one wanted to leave - always a good sign.

"But they wouldn't come all the way here, take a look around, and go back without leaving a sign."

There wasn't any real reason to worry about leaving signs of where they had been.

It'll make no difference, but there is a sign of me in this time when men could still leave signs.

He left signs along the coast to show that they were the first to live there.

They had reached here alive and with confidence enough to leave a sign for anyone following!

We took care to leave signs you could follow so as to discover the truth.

Not leaving signs didn't seem to be a high priority for these boys.