This article is from the Final-Fantasy and other Square Soft Games FAQ, by firstname.lastname@example.org (Nick Zitzmann) with numerous contributions by others.
You need to bring the residents some Nagaette Bromide. Nagaette Bromide
is hidden in the lower-left room from the main hallway in the Cathedral;
find it and give it to them to receive a tab.
Because you have to fight several Henchmen after you get the Bromide, it
can be difficult for a beginner to get the Bromide.