ascetic

He is clean-shaven, pale, and ascetic-looking, retaining something of the professor in his features.

I knew not what wild beast we were about to hunt down in the dark jungle of criminal London, but I was well assured, from the bearing of this master huntsman, that the adventure was a most grave one—while the sardonic smile which occasionally broke through his ascetic gloom boded little good for the object of our quest.

Now I knew that under ordinary conditions he no longer craved for this artificial stimulus, but I was well aware that the fiend was not dead but sleeping, and I have known that the sleep was a light one and the waking near when in periods of idleness I have seen the drawn look upon Holmes’s ascetic face, and the brooding of his deep-set and inscrutable eyes.

A man of deep character, a man with an alert mind, grim, ascetic, self-contained, formidable—so I read Dr.