"There is no use in our calling you names.

You can supply the names yourselves.
And, if you're afraid to fight us, man to man, then you know well enough what else you are! Now, what has become of Greg Holmes and Dan Dalzell ?" "Oh, very likely they're still running as fast as they can go toward Gridley," jeered Fred.
"That's a lie, and no one knows it better than you!" flashed Dick.

"Greg and Dan are not of the running kind." "Oh, I'm a liar, also, am I ?" choked Ripley.
"You know yourself better than any one else can," was Prescott's taunting answer.
"Come on, fellows!" urged Fred.

"Rush 'em!" There was a prompt rush.

Dick and his friends did not flinch, but met the attack squarely.