He has several times recently proved himself to be a daring fellow; unless I am mistaken he will shortly prove himself to be still more daring.' 'But what can he do?
Surely you don't suggest that he will attempt the life of Prince Eugen in this hotel ?' 'Why not?
If Reginald Dimmock fell on mere suspicion that he would turn out unfaithful to the conspiracy, why not Prince Eugen ?' 'But it would be an unspeakable crime, and do infinite harm to the hotel!' 'True!' Racksole admitted, smiling.

Little Felix Babylon seemed to brace himself for the grasping of his monstrous idea.
'How could it possibly be done ?' he asked at length.
'Dimmock was poisoned.' 'Yes, but you had Rocco here then, and Rocco was in the plot.

It is conceivable that Rocco could have managed it--barely conceivable.

But without Rocco I cannot think it possible.

I cannot even think that Jules would attempt it.