Read it through once

“Then be so kind,” urged Miss Manette, “as to leave us here. You see how composed he has become, and you cannot be afraid to leave him with me now. Why should you be? If you will lock the door to secure us from interruption, I do not doubt that you will find him, when you come back, as quiet as you leave him. In any case, I will take care of him until you return, and then we will remove him straight.”