Read it through once

"You know," said Mr. Swindles, glancing at Jim as if to assure himself that the boy was there and unable to escape from the hooks of his sarcasm, "how fast the Gaffer talks, and how he hates to be asked to repeat his words. Knowing this, Jim always says, 'Yes, sir; yes, sir.' 'Now do you quite understand?' says the Gaffer. 'Yes, sir; yes, sir,' replies Jim, not having understood one word of what was said; but relying on us to put him right. 'Now what did he say I was to do?' says Jim, the moment the Gaffer is out of hearing. But this morning we were on ahead, and the Gaffer had Jim all to himself. As usual he says, 'Now do you quite understand?' and as usual Jim says, 'Yes, sir; yes, sir.' Suspecting that Jim had not understood, I said when he joined us, 'Now if you are not sure what he said you had better go back and ask him,' but Jim declared that he had perfectly understood. 'And what did he tell you to do?' said I. 'He told me,' says Jim, 'to bring the colt along and finish up close by where he would be standing at the end of the track.' I thought it rather odd to send Firefly such a stiff gallop as all that, but Jim was certain that he had heard right. And off they went, beginning the other side of Southwick Hill. I saw the Gaffer with his arms in the air, and don't know now what he said. Jim will tell you. He did give it you, didn't he, you old Woolgatherer?" said Mr. Swindles, slapping the boy on the shoulder.