Why do you think Kit is trembling and excited as she waits for the Dolphin to arrive in Wethersfield? What might this indicate?

Kit is anticipating Nat's arrival.

At last she glimpsed a fair head emerging from the hatchway, almost hidden behind a vast load. It was some time before Nat
Eaten, carelessly scanning the busy wharf, caught sight of her. Then he raised one hand in the briefest possible greeting.