perhaps tell for my protection."

"Protection?" says he. "For your protection? Here is a phrase that
somewhat dampens me. If the matter be so dangerous, I own I would be a
little loath to move in it blindfold."

"I believe I could indicate in two words where the thing sticks," said
I.

"Perhaps that would be the best," said he.

"Well, it's the Appin murder," said I.

He held up both the hands. "Sirs! sirs!" cried he.

I thought by the expression of his face and voice that I had lost my
helper.

"Let me explain ..." I began.

"I thank you kindly, I will hear no more of it," says he. "I decline _in
toto_ to hear more of it. For your name's sake and Rankeillor's, and
perhaps a little for your own, I will do what I can to help you; but I
will hear no more upon the facts. And it is my first clear duty to warn
you. These are deep waters, Mr. David, and you are a young man. Be
cautious and think twice."

"It is to be supposed I will have thought oftener than that, Mr.
Balfour," said I, "and I will direct your attention again to
Rankeillor's letter, where (I hope and believe) he has registered his