In short, that it was made by either a pin or a cuff button in his wristband when he was attacked and fell.

But, enlighten me upon a puzzling point, Sir Henry: What do you use coriander and oil of sassafras for in a stable ?" "Coriander?
Oil of sassafras?
I don't know what the dickens they are.
Have you found such things here ?" "No; simply smelt them.

The combination is not usual--indeed, I know of but one race in the world who make any use of it, and they merely for a purpose which, of course, could not possibly exist here, unless--" He allowed the rest of the sentence to go by default, and turning, looked all round the place.

For the first time he seemed to notice something unusual for the equipment of a stable, and regarded it with silent interest.

It was nothing more nor less than a box, covered with sheets of virgin cork, and standing on the floor just under one of the windows, where the light and air could get to a weird-looking, rubbery-leaved, orchid-like plant, covered with ligulated scarlet blossoms which grew within it.
"Sir Henry," he said, after a moment, "may I ask how long it is since you were in South America ?" "I?
Never was there in my life, Mr.Cleek--never." "Ah! Then who connected with the hall has been ?" "Oh, I see what you are driving at," said Sir Henry, following the direction of his gaze.