Yeah, the earliest scene we have from Visser is when Edriss receives news that the humans have been discovered. Which is news Esplin 9466 sent after meeting Chapman and Loren. So those two events overlap, approximately. Everything else in Visser takes place after that moment. The trial itself is post 35 and most of the flashback/memory scenes take place in (I think) the late 70's/early 80's, which is about the same time that in TAC the Ellimist would be taking Elfangor back to his people.