and worked out a plan

"Oh, beware! These are awful words! Any moment these walls may crumble upon us if you say such things. Oh call them back before it is too late!" Now this strange exhibition gave me a good idea and set me to thinking. If everybody about here was so honestly and sincerely afraid of Merlin's pretended magic as Clarence was, certainly a superior man like me ought to be shrewd enough to contrive some way to take advantage of such a state of things. I went on thinking, and worked out a plan. Then I said: "Get up. Pull yourself together; look me in the eye. Do you know why I laughed?" "No -- but for our blessed Lady's sake, do it no more." "Well, I'll tell you why I laughed. Because I'm a magician myself." "Thou!" The boy recoiled a step, and caught his breath, for the thing hit him rather sudden; but the aspect which he took on was very, very respectful. I took quick note of that; it indicated that a humbug didn't need to have a reputation in this asylum; people stood ready to take him at his word, without that. I resumed. "I've know Merlin seven hundred years, and he --" "Seven hun --" "Don't interrupt me. He has died and come alive again thirteen times, and traveled under a new name every time: Smith, Jones, Robinson, Jackson, Peters, Haskins, Merlin -- a new alias every time he turns up. I knew him in Egypt three hundred years ago; I knew him in India five hundred years ago -- he is always blethering around in my way, everywhere I go; he makes me tired.