This question is about the short story "The Monkey's Paw" by W. W. Jacobs.
Answer and Explanation:
Sgt. Morris is a friend of the Whites who visits them one day and shows them a mummified monkey's paw. He explains that the paw is enchanted and that it has the power to grant three wishes to three different people. Sgt. Morris has already used his three wishes.
What does Sgt. Morris tell us about the previous wisher?
Besides Sgt. Morris, another man has already used his three wishes as well. However, the sergeant makes a point of revealing that the man's last wish was for his own death.
How might this foreshadow danger in the future for the Whites?
The information about the previous wisher foreshadows a tragic outcome for the Whites. Sgt. Morris is warning them about the paw. He tells them that the paw shows, in a dangerous manner, that we should not interfere with fate.
In the end, the Whites do not listen to Sgt. Morris. They use the paw and their very first wish results in the death of their son.