Answer:
Ulrich's family received that land:
2 generations ago.
Step-by-step explanation:
"The Interlopers" is a short story by author Saki. On the second paragraph of the story, readers are told about the land Ulrich von Gradwitz has inherited and is now so zealously protecting. The person who got the land after a lawsuit was his grandfather. Therefore, we can say Ulrich's family received that land two generations ago:
Ulrich ----------------------> Ulrich's father ----------------------> Ulrich's grandfather
1 gen. 2 gen.
The story revolves around the conflict between Ulrich and his neighbor, who often trespasses and hunts on Ulrich's land. The ending is filled with irony when both men decide to leave their disagreement behind and finally forgive each other only to be killed by wolves.