But what you may not know is this: that in serving its original purpose, it has proved to be our guide in another of equal, if not greater, importance.

For instance, it shows us quite plainly who of all the persons present at the time of first alarm were near enough to the Curator's office to be in the line of escape from the particularly secluded spot from which the arrow was delivered.

Of these persons, only one fulfills all other necessary conditions with an exactness which excuses any special interest we may feel in him.

It is he who is tabulated here as number 3." It was said.

Mr.Roberts was well acquainted with his own number.