He picked up his pencil and began making more hieroglyphics.
"What's your theory, Mr.Spargo ?" he asked suddenly.

"I suppose you've got one." "Have you ?" asked Spargo, bluntly.
"Well," returned Rathbury, hesitatingly, "I hadn't, up to now.

But now--now, after what you've told me, I think I can make one.

It seems to me that after Marbury left Aylmore he probably mooned about by himself, that he was decoyed into the Temple, and was there murdered and robbed.

There are a lot of queer ins and outs, nooks and corners in that old spot, Mr.Spargo, and the murderer, if he knew his ground well, could easily hide himself until he could get away in the morning.
He might be a man who had access to chambers or offices--think how easy it would be for such a man, having once killed and robbed his victim, to lie hid for hours afterwards?
For aught we know, the man who murdered Marbury may have been within twenty feet of you when you first saw his dead body that morning.