Very early on the following morning I was aroused from my sleep by a tap upon my bedroom door. It was a messenger with a note from Mortimer.
"Do come round," it said; "the matter is becoming more and more extraordinary."
When I obeyed his summons I found him pacing excitedly up and down the central room, while the old soldier who guarded the premises stood with military stiffness in a corner.
"My dear Jackson," he cried, "I am so delighted that you have come, for this is a most inexplicable business."
"What has happened, then?"
He waved his hand towards the case which contained the breastplate.
"Look at it," said he.
I did so, and could not restrain a cry of surprise. The setting of the middle row of precious stones had been profaned in the same manner as the upper ones. Of the twelve jewels eight had been now tampered with in this singular fashion. The setting of the lower four was neat and smooth. The others jagged and irregular.
"Have the stones been altered?" I asked.
"No, I am certain that these upper four are the same which the expert pronounced to be genuine, for I observed yesterday that little discoloration on the edge of the emerald. Since they have not extracted the upper stones, there is no reason to think the lower have been transposed. You say that you heard nothing, Simpson?"