Geographer Novain:
It's not difficult. You will have to do it if you're looking for the delegation anyway. When you're hunting the monsters on Forsaken Plains, you will come across Embryo Predators. Get those Embryo Predators and collect 10 Missive Scraps. I'm trying to find out what Embryo is planning.
It's likely that the Ertheia delegation was attacked by an Embryo Predator. It's going to help your investigation anyway. I will try to find out about the delegation as well.