"No, you are wrong.

You did kill Kaffar, and he lies at the bottom of yonder ghostly pool; so that is not the reason.

Why I do not wish you to search for him is that thereby you might find out things about me that I do not wish you to do.

In such a life as mine there are naturally things that I do not wish known.

In going to my old haunts, trying to unearth Kaffar, you would learn something about them.