Read it through once

“These?” said Wemmick, getting upon a chair, and blowing the dust off the horrible heads before bringing them down. “These are two celebrated ones. Famous clients of ours that got us a world of credit. This chap (why you must have come down in the night and been peeping into the inkstand, to get this blot upon your eyebrow, you old rascal!) murdered his master, and, considering that he wasn’t brought up to evidence, didn’t plan it badly.”