So paralyzed were we by the apparition that we allowed him to pass before we had recovered our nerve.

Then Holmes and I both fired together, and the creature gave a hideous howl, which showed that one at least had hit him.

He did not pause, however, but bounded onward.

Far away on the path we saw Sir Henry looking back, his face white in the moonlight, his hands raised in horror, glaring helplessly at the frightful thing which was hunting him down.

But that cry of pain from the hound had blown all our fears to the winds.