Page 153 of The Doctor's Irreplaceable Love

He lifted his head, but Shelley didn’t let go of him.He smiled at her when they heard Cash say, “I like Shelley.She’s good people—and she’s just right for Trip.There’s a word but …”

Trip nodded as he looked down into her eyes with a smile.

“Yeah.I know what you mean,” Trav said.

Even though they were walking away across the deck, Trip could still hear them clearly.

“Compatible,” said Cash.

Trip rested his forehead against Shelley’s and murmured, “Irreplaceable.”;

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