Ivery was the best brain Macgillivray and I ever encountered, the most cunning and patient and long-sighted.
Combine him with the other, the chameleon who can blend himself with his environment, and has as many personalities as there are types and traits on the earth.

What kind of enemy is that to have to fight ?' 'I admit it's a steep proposition.

But after all how much ill can he do?
There are pretty strict limits to the activity of even the cleverest spy.' 'I agree.

But this man is not a spy who buys a few wretched subordinates and steals a dozen private letters.

He's a genius who has been living as part of our English life.