force which this woman can use and society is ignorant of.  The mere fact that it ebbs with her strength shows how entirely it is subject to physical laws.  If I had time, I might probe it to the bottom and lay my hands upon its antidote.  But you cannot tame the tiger when you are beneath his claws.  You can but try to writhe away from him.  Ah, when I look in the glass and see my own dark eyes and clear-cut Spanish face, I long for a vitriol splash or a bout of the small-pox.  One or the other might have saved me from this calamity.

I am inclined to think that I may have trouble to-night.  There are two things which make me fear so.  One is that I met Mrs. Wilson in the street, and that she tells me that Miss Penclosa is better, though still weak.  I find myself wishing in my heart that the illness had been her last.  The other is that Professor Wilson comes back in a day or two, and his presence would act as a constraint upon her.  I should not fear our interviews if a third person were present.  For both these reasons I have a presentiment of trouble to-night, and I shall take the same precautions as before.

April 10.  No, thank God, all went well last night.  I really could not face the gardener again.  I locked my door and thrust the key underneath it, so that I had to ask the maid to let me out in the morning.  But the precaution was really not needed, for I never had any inclination to go out at all.  Three evenings in succession at home!  I am surely near the end of my troubles, for Wilson will be home again either today or tomorrow.  Shall I tell him of what I have gone through or not?  I am convinced that I should not have the slightest sympathy from him.  He would look upon me as an interesting case, and read a paper about me at the next meeting of the Psychical Society, in which he would gravely discuss the possibility of my being a deliberate liar, and weigh it against the chances of my being in an early stage of lunacy.  No, I shall get no comfort out of Wilson.

I am feeling wonderfully fit and well.  I don’t think I ever lectured with greater spirit.  Oh, if I could only get this shadow off my life, how happy I should be!  Young, fairly wealthy, in the front rank of my profession, engaged to a beautiful and charming girl—­ have I not every thing which a man could ask for?  Only one thing to trouble me, but what a thing it is!

Midnight.  I shall go mad.  Yes, that will be the end of it.  I shall go mad.  I am not far from it now.  My head throbs as I rest it on my hot hand.  I am quivering all over like a scared horse.  Oh, what a night I have had!  And yet I have some cause to be satisfied also.