On the other hand, when a sudden pungent scent and a rustle among the twigs set Finn leaping forward after the strangest-looking beast his eyes had ever seen, Jess joined with him, in a good-humoured, rather indifferent manner, and between them they just missed a big "goanner," as Bill called the iguana, or Gould Monitor. This particular 'guana had a tail rather more than twice its own length, and the last foot of this paid forfeit in Finn's jaws for the animal's lack of agility. Though, when one says lack of agility, it is fair to add that only a very swiftly moving creature could have escaped the two hounds at all; and, once it reached a tree-trunk, this reptile showed simply wonderful cleverness in climbing, running up fifty feet of iron-bark trunk as quickly as it could cover the level ground, and keeping always on the far side of the tree from the dogs, its long, ugly, wedge-shaped head constantly turning from side to side, in keen, listening observation. From Jess's contemptuous, half-hearted bark, Finn gathered that this singularly ugly creature was not one of the deadly people, but also, on the other hand, that it was not game worthy of a hound's serious attention. After four days of this sort of life, during practically every hour of which Finn was learning bush-craft from Jess, and learning at a great rate for the reason that his intelligence was of a higher order than that of the kangaroo-hound, while his hunting instincts came to him from an older and more direct line of inheritance, the Wolfhound began to feel almost as thoroughly at home in the bush as he had felt on his own hunting-ground in Sussex. But, rather curiously perhaps, he advanced hardly at all in the intimacy of his relations with Bill. In a sense, outwardly at all events, Bill was more closely allied to Sam and the Professor, and to other people of the Southern Cross Circus, than to the Master, or to humans Finn had known at all intimately before. The Wolfhound was conscious that the boundary-rider was friendly; but, on the other hand, he had points in common with the circus people, whose doings had burned right into Finn's very soul; and, in any case, Finn saw no particular reason for taking further risks where this man was concerned. It was extremely pleasant to lie near the camp-fire with Jess of a night, and to run with Jess in the bush by day; but nothing would induce Finn to approach the gunyah more nearly, or to allow Bill's hand to come within a yard of him. The possibility, however remote, of confinement, of torture behind iron bars, was something he could not bring himself to trifle with.