They showed no sign of having been tampered with.
Persons employed in the University, who were certain to know, were asked if duplicate keys existed, and all united in answering in the negative.
The medical attendant was examined, and declared that it was physically impossible for Doctor Fontaine to have left his bed, and visited the laboratory, between the time of writing his Instructions and the time of his death.
"While these investigations were proceeding, Doctor Fontaine's senior assistant obtained leave to examine through a microscope the sealing-wax left on the box which had contained the keys.
"The result of this examination, and of the chemical analyses which followed, proved that two different kinds of sealing-wax (both of the same red color, superficially viewed) had been used on the seal of the box--an undermost layer of one kind of wax, and an uppermost layer of another, mingled with the undermost in certain places only.

The plain inference followed that the doctor's sealing-wax had been softened by heat so as to allow of the opening of the box, and that new sealing-wax had been afterwards added, and impressed by the Doctor's seal so that the executor might suspect nothing.

Here, again, the evidence of the medical attendant (present at the time) proved that Doctor Fontaine had only used one stick of sealing-wax to secure the box.

The seal itself was found in the possession of the widow; placed carelessly in the china tray in which she kept her rings after taking them off for the night.
"The affair is still under judicial investigation.

I will not trouble you by reporting the further proceedings in detail.
"Of course, Widow Fontaine awaits the result of the investigation with the composure of conscious innocence.