His face was grimed with coal-dust, and a coarse blue shirt, open at the neck, revealed a wide throat and massive chest.
"An' who 're you ?" Simpson snarled, angry at the interruption.
"None of yer business," the newcomer retorted tartly.

"But, if it 'll do you any good, I 'm a fireman on the China steamers, and, as I said, I 'm goin' to see fair play.

That 's my business.

Your business is to give fair play.

So pitch in, and don't be all night about it." The three boys were as pleased by the appearance of the fireman as Simpson and his followers were displeased.