He'll work back and forth between the two of you, seeing that you each do your work right.

Boys, don't make any mistakes today, will you, So much depends, you know, upon the way you start in at a new job." "We'll do the best that's in us," breathed Tom ardently.
"Engineer Rutter," called Blaisdell, "your two assistants are ready.

Get your two sets of chainmen and make a flying start." Animated by the spirit of activity that pervaded the camp, Tom and Harry ran to select their instruments, while Rutter hastened after his chainmen.
Bad Pete had not appeared at either mess this morning.

He had small need to, for, in the still watches of the night, he had burglarized the cook's stores so successfully that not even that argus-eyed individual had noticed the loss.
Having breakfasted heartily in a deep thicket, Pete now looked down over the camp, his eyes twinkling in an evil way.
"I'll get bounced out of mess on account of two pasty-faced tenderfeet like those boys, will I ?" Pete grumbled to himself.

"Before this morning is over I reckon I'll have all accounts squared with the tenderfeet!".