Optional: Head to the top floor of the Tavnazian Safehold and go behind the Walnut Door @ (K-10) / (J-9) border and walk towards Despachiaire for a cutscene.
Optional: Go to (L-6) of Northern San d'Oria and talk to Chasalvige (Cathedral - Manuscript Room). He will have no information on events you describe and suggest to ask around at Port San d'Oria.
Optional: Go to (H-6) of Port San d'Oria and talk to Anoki, who will have hard time believing you and suggests you ask around at the other agencies as long as you do not mind your sanity being questioned.
If you go to Port Bastok without talking to Anoki, you will get an alternate cutscene, where Louverance expresses surprise over the speed at which "you adventurers" can move around. This alternate cutscene is not available at the Melody Minstrel.
Talk to Cid for a cutscene at (H-8) of Metalworks, the second floor up.