Let's forget all about it.

We both behaved foolishly, you and I, Bobby.

And he--well, let's just call him eccentric, and not think about him any more." She drew the reluctant collie into the house, and closed the door.

But, a few minutes later, when her back chanced to be turned, and when a maid came into the room leaving the door ajar, Bobby slipped out.
In another five seconds he was in the road, casting about for Brice's trail.

Finding it, he set off, at a hard gallop, nostrils close to the ground.