"All right," I replied. "I will not examine it while you are in the
room. You will perhaps allow me to keep the key?"

"Certainly! You can take it from the bunch, if you wish. This is it. I
shall be only too glad to have it well out of my own keeping."

"We will go downstairs," I said.

We returned to Sir Henry's library. It was my turn now to lock the door.

"Why do you do that?" he asked.

"Because I wish to be quite certain that no one overhears our
conversation."

"What have you got to say?"

"I have a plan to propose to you."

"What is it?"

"I want you to change bedrooms with me to-night."

"What can you mean?--what will Lady Studley say?"

"Lady Studley must know nothing whatever about the arrangement. I think
it very likely that the apparition which troubles you will be discovered
to have a material foundation. In short, I am determined to get to the
bottom of this horror. You have seen it often, and your nerves are much