"I follow," said he.
"Now, the principle in a' these cases of crime and detection," resumed the philosopher, assuming his lecturer's air, "is noticing such sma' points of detail as escape the eye of the ordinar' observer, taking full and accurate measurements, making a plan with the principal sites carefully markit, and drawing, as it were, logical conclusions. Applying this method now to the present instance, Mr. Cromarty, the first point to observe is that the room is twenty-six feet long, measured from the windie, which is a bit recessed or set back, as it were, to the other end of the apartment. Half of 26 is 13, and if you take the half way line and draw approximate perpendiculars to about where the table was standing and to as near as one can remember where the middle of the corp roughly was lying, you get exactly six feet ten and five-eighths inches, in both cases."
"An approximate perpendicular to roughly about these places gives this exact measurement?" repeated Cromarty gravely. "Well, what next?"
"Well, sir, I'll not insist too much on the coincidence, but it seems to me vera remarkable. But the two significant features of this case seem to me yon table being upset over by the windie and the corp being found over by the door."
"You're talking horse sense now," murmured Ned.
"Now, yon table was upset by Sir Reginald falling on it!"
Ned looked at him keenly.
"How do you know?"
"Because one of the legs was broken clean off!"
"What, when we saw it this morning?"