"Is it possible that this can be sleeping sickness ?" "I should not like to say that it is impossible," I replied.

"The disease is practically unknown to me.

I have never practised out of England and have had no occasion to study it.

Until I have looked the subject up, I should not be in a position to give an opinion.

Of course, if I could see Mr.Graves in one of what we may call his 'lucid intervals' I should be able to form a better idea.