‘How long is it since your wife asked you for a hundred pounds?’

‘Nearly two months.’

‘Have you ever seen a photograph of her first husband?’

‘No; there was a great fire at Atlanta very shortly after his death, and all her papers were destroyed.’

‘And yet she had a certificate of death. You say that you saw it?’

‘Yes, she got a duplicate after the fire.’

‘Did you ever meet anyone who knew her in America?’

‘No.’

‘Did she ever talk of revisiting the place?’

‘No.’

‘Or get letters from it?’

‘Not to my knowledge.’

‘Thank you. I should like to think over the matter a little now. If the cottage is permanently deserted we may have some difficulty; if on the other hand, as I fancy is more likely, the inmates were warned of your coming, and left before you entered yesterday, then they may be back now, and we should clear it all up easily. Let me advise you, then, to return to Norbury and to examine the windows of the cottage again. If you have reason to believe that it is inhabited do not force your way in, but send a wire to my friend and me. We shall be with you within an hour of receiving it, and we shall then very soon get to the bottom of the business.’

‘And if it is still empty?’

‘In that case I shall come out to-morrow and talk it over with you. Good-bye, and above all things do not fret until you know that you really have a cause for it.’

‘I am afraid that this is a bad business, Watson,’ said my companion, as he returned after accompanying Mr Grant Munro to the door. ‘What do you make of it?’

‘It had an ugly sound,’ I answered.

‘Yes. There’s blackmail in it, or I am much mistaken.’

‘And who is the blackmailer?’

‘Well, it must be this creature who lives in the only comfortable room in the place, and has her photograph above his fireplace. Upon my word, Watson, there is something very attractive about that livid face at the window, and I would not have missed the case for worlds.’

‘You have a theory?’

‘Yes, a provisional one. But I shall be surprised if it does not turn out to be correct. This woman’s first husband is in that cottage.’

‘Why do you think so?’