He is just beginning to suspect the fact, and trying to use it for his own benefit.

I wish I was in Naples with your friend Holden." "But, Mr.Brett, the murderer is in London! What about this morning's attempt--" "My dear fellow, you are already constructing the gallows.

Leave that to the gaol officials.

What we do not yet know is the motive.

The key to the mystery is in Naples, probably in Capella's hands at this moment.