And now, a little detail bothered him. Not about the case. No, that was fine. It was something else.
Something about Allie.
But damn, he couldn’t put his finger on it. He was fine when she’d left this morning. At least he thought he was. But sometime after her call, maybe an hour or so, something clicked in his mind. The little detail.
Detail. Something insignificant? Something important? Think . . . think . . . Damn, what was it?
His mind clicked.
Something . . . something . . . something said? Something had been said? Yes, that was it. He knew it. But what was it? Had Allie said anything on the phone? That had been when it started, and he ran through the conversation again. No, nothing out of the ordinary.
This clip is from The notebook by Nicholas Sparks. I asked question to pinpoint many pronouns. It's so ambiguous that I can't be sure about them.
1)that was it.
That indicates "a little detail" and it means "what Allie said on the phone"?
2)That had been when it started,
If I revive the left-out part on the above sentence, It will be like "That had been on the phone when it started", is it right?
Then, in this sentence, what is "that" indicating and what is "it" pointing to?