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"Subtle enough and horrible enough. When a doctor does go wrong

he is the first of criminals. He has nerve and he has knowledge.

Palmer and Pritchard were among the heads of their profession.

This man strikes even deeper, but I think, Watson, that we shall

be able to strike deeper still. But we shall have horrors enough

before the night is over; for goodness' sake let us have a quiet

pipe and turn our minds for a few hours to something more

cheerful."

About nine o'clock the light among the trees was extinguished,

and all was dark in the direction of the Manor House. Two hours

passed slowly away, and then, suddenly, just at the stroke of

eleven, a single bright light shone out right in front of us.

"That is our signal," said Holmes, springing to his feet; "it

comes from the middle window."