Can it then be a question of private enmity or revenge?
I think not.

To the best of my belief I have no private enemies whatever.

There remains only my vocation as an investigator in the fields of legal and criminal research.

His interest in my death must, therefore, be connected with my professional activities.

Now, I am at present conducting an exhumation which may lead to a charge of murder; but if I were to die to-night the inquiry would be carried out with equal efficiency by Professor Spicer or some other toxicologist.