Read it through once

“So it will walk all day, sir,” whispered Poole; “ay, and the better part of the night. Only when a new sample comes from the chemist, there’s a bit of a break. Ah, it’s an ill conscience that’s such an enemy to rest! Ah, sir, there’s blood foully shed in every step of it! But hark again, a little closer—put your heart in your ears, Mr. Utterson, and tell me, is that the doctor’s foot?”