Why are there no attendants at the narrators palazzo in The Cask of Amontillado?

There are no attendants at the Palazzo, "Because they has absconded to make merry in honor of their time, he had earlier told them that he wont be back until morning and gave each of them explicit orders not to stir from the house, but these orders were sufficient, he well knew, to insure their immediate disappearance as soon as he left"