Why was the masquerade cancelled?

in the line from the end of the story "the cask of the amontillado," by edgar allan poe, the narrator has put the last stone on the wall, thus sentencing fortunato to death. just like that montresor associates his feeling of sickness to the humidity of the catacombs, and seems to be glad he has taken revenge on fortunato. however, montresor's last words are "in pace requiescat," which mean "may he rest in peace." as a result, it can be inferred that he hides or does not want to assume his guilt or remorse for killing fortunato in such a horrible way.

1

abominable dr. phibes

1: 42

2

american psycho

2: 07

3

speak of the devil

1: 48

4

walk among us

1: 23

5

the hunger

1: 43

6

from hell they came

7

dig up her bones

3: 02

8

blacklight

1: 28

9

resurrection

1: 30

10

dead kings rise

3: 05

11

this island earth

2: 15

12

crimson ghost

2: 01

13

day of the dead

1: 50

14

the haunting

1: 26

15

mars attacks

2: 28

16

hate the living, love the dead

1: 37

17

shining

3: 00

18

don’t open ’til doomsday / hellnight

7: 58