1) in Event 3 "Dark Pleasures" Undamesta leads the PC's to the second floor to the noble's terrace (area A47) On the map it only goes up to A36. I assuming the nobile's terrace is A36.
2) how do you get to room B13. There is only a hole in the floor but is not mentioned in B13 and in room B10 the hole is metioned as a trap "passage to the void.