CHAPTER XXII 

Not altogether unwillingly, in the darkness of night, despite that he disliked the man, did Michael go with Harry Del Mar. Like a burglar the man came, with infinite caution of silence, to the outhouse in Doctor Emory's back yard where Michael was a prisoner. Del Mar knew the theatre too well to venture any hackneyed melodramatic effect such as an electric torch. He felt his way in the darkness to the door of the outhouse, unlatched it, and entered softly, feeling with his hands for the wire- haired coat. 

And Michael, a man-dog and a lion-dog in all the stuff of him, bristled at the instant of intrusion, but made no outcry. Instead, he smelled out the intruder and recognised him. Disliking the man, nevertheless he permitted the tying of the rope around his neck and silently followed him out to the sidewalk, down to the corner, and into the waiting taxi. 

His reasoning--unless reason be denied him--was simple. This man he had met, more than once, in the company of Steward. Amity had existed between him and Steward, for they had sat at table, and drunk together. Steward was lost. Michael knew not where to find him, and was himself a prisoner in the back yard of a strange place. What had once happened, could again happen. It had happened that Steward, Del Mar, and Michael had sat at table together on divers occasions. It was probable that such a combination would happen again, was going to happen now, and, once more, in the bright-lighted cabaret, he would sit on a chair, Del Mar on one side, and on the other side beloved Steward with a glass of beer before him--all of which might be called "leaping to a conclusion"; for conclusion there was, and upon the conclusion Michael acted. 
What the author compared Michael with?
a man-dog and a lion-dog