The cunning of these unfortunates is proverbial and is only equalled by their secretiveness and mendacity.

It would be quite possible for this man to feign profound stupor so long as he was watched, and then, when left alone for a few minutes, to nip out of bed and help himself from some secret store of the drug.

This would be quite in character with his objection to seeing a doctor and his desire for secrecy.

But still, I did not believe it to be the true explanation.

In spite of all the various alternative possibilities, my suspicions came back to Mr.Weiss and the strange, taciturn woman, and refused to budge.
For all the circumstances of the case were suspicious.