Thanks to Francis - @Col_Mustard_Ret , Balthasar - @iBug , Quinn - @Rori_95 Dharax - @Dharaxas , Mischief - @Frankie , Medlar - @schwick , Teodore - @Tiero for venturing back to the Spinsterite Nunnery.
After Rougher recalled that from the Red Carnival the Spinsterite Nunnery in Amaunasseas should be abandoned, its treasures free for the taking, our heroes set sail on the Miss Fit with Captain Edwige the bewhiskered, aiming to take on this easy task.
After a few questions around the waterfront, the tunnel to the Abbey was found and our heroes worked their way into the old catacombs. A little prying around found the site of the fighting retreat during the Red Carnival and a handful of scorched and finally-dead Spinsterites - salvaging their outfits four of the party joined the rest of the Spinsterites at their dining, presided over by the Abbess.
Significant subterfuge and confusion and the provision of the finest possible dish to be made from the toxic Mold of the Catacombs distracted the spinsterite sisters while the party looked around under the guise of running errands. The talking mask of Sister Marangola was recovered, books and silverware snatched and eventually the treasure cache beneath the chapel altar raided.
Finally after riling the Spinsterites up with illusory cries of heretics our heroes made their escape with the hungering undead hot on their heels and rejoined Edwige to sail home once more.
You all net 35gp into your pockets from your share of selling off the treasures and silverware from the catacombs.
Anyone who wants to add a write up of their adventure to the campaign log gets inspiration for their next Brancalonia adventure.