What words did the general exchange with MacChesnay

“Oh, thunder, MacChesnay, what an awful bull you made of this thing!” began the officer. He attempted low tones, but his indignation caused certain of the men to learn the sense of his words. “What an awful mess you made! Good Lord, man, you stopped about a hundred feet this side of a very pretty success! If your men had gone a hundred feet farther you would have made a great charge, but as it is—what a lot of mud diggers you’ve got anyway!”