It is not impossible that a terrier whose pleasure was concerned would perceive those amiable signs and know their meaning--know why his master stood in a peculiar way, talked with alacrity, and even had a peculiar gleam in his eye, so that on the least movement toward the door, the terrier would scuttle to be in time. And, in dog fashion, Grandcourt discerned the signs of Gwendolen's expectation, interpreting them with the narrow correctness which leaves a world of unknown feeling behind.

Just as a terrier may perceive its master's purpose by the slightest signs, and scuttle to the door ready to go out, so, in dog fashion, Grandcourt discerned the signs of Gwendolen's intentions.
