I've been taught that courtesy can't be repaid with cash.

You are very, very welcome to any service that I was able to do you." As Dick hurried into the Central Grammar "dressing room" he found all five of his chums waiting to rub him down and help him dress.
"Here, give me that towel, and get out on other business in a hurry!" begged Dick.

"Dave! Tom! Amos Garwood is in the boathouse below here, working at a bench.

Get some of the men and rush down there to make a capture.

Greg, run and see to it that a launch moves down to the river end of the boathouse in case Garwood tries to get out that way when he hears the alarm!" Prescott's chums darted out in a hurry.