You are skilled in proofs; that is your profession.

Mine only gets so far as suspicions, and what we call our own proofs--which are nothing but ex parte evidence after all.

You know Miss Trelawny better than I do; and though I watch round the sick-room, and go where I like about the house and in and out of it, I haven't the same opportunities as you have of knowing the lady and what her life is, or her means are; or of anything else which might give me a clue to her actions.

If I were to try to find out from her, it would at once arouse her suspicions.

Then, if she were guilty, all possibility of ultimate proof would go; for she would easily find a way to baffle discovery.