He missed the sights, smells and sounds of his own neighborhood.
<u>Explanation</u>:
Colin had travelled a half-way around the world and he didn't have a hard time. He had been wondering who might he would become after those travels.
But he longed for his home, his real home in England. He missed his friends, sights, smells and sounds of his neighborhood. Before the thought of joining the conversation with the guide,he thought of this in his mind.
