That was certain.

Everything would tend to throw the suspicion of having attempted to commit a horrible wholesale murder, upon Elettra.

The will could be kept back until the first uproar and excitement should be over.

Then Matilde would have the fortune, Gregorio would be saved, and Elettra would be condemned to penal servitude for life.
It was certainly a very bold plan, and Matilde did not see where it could fail..