After two cups of tea, Gwyn's sister seems to have calmed down enough to answer questions.
"All right," Ffion says, "so Gwyn is missing?"
"Mph."
"When did you last see him?" Ffion persists.
"The day before yesterday. In the evening."
"Well, he did work here that day, but if you saw him after that..."
"He said he was coming back here."
Ffion starts, surprised. "What?"