Read it through once

How Joe got out of the room, I have never been able to determine; but I know that when he did get out he was steadily proceeding upstairs instead of coming down, and was deaf to all remonstrances until I went after him and laid hold of him. In another minute we were outside the gate, and it was locked, and Estella was gone. When we stood in the daylight alone again, Joe backed up against a wall, and said to me, “Astonishing!” And there he remained so long saying, “Astonishing” at intervals, so often, that I began to think his senses were never coming back. At length he prolonged his remark into “Pip, I do assure _you_ this is as-TON-ishing!” and so, by degrees, became conversational and able to walk away.