"Well, why didn't you tell me this before," scolded Aggie. "So we're talking here about a small red light that's tinier than a torch beam."

Ella nodded. "Sometimes it moves slowly, and other times it just flies along." In fact, once it had actually stopped and she had almost caught it.

"Look, are you sure you're not just imagining the whole thing?" asked Aggie. For try as she might, she was unable to think what a light like that could be.

"Of course not," quacked Ella. She was very miffed about being accused of "seeing thing." Things that were not there, that is. She would have to prove to Aggie that the mysterious light was real. And the only way to do that was to wait over by the trees, until it showed up again. She had to find out what it was.