Okay, Mike Castro purchased 80 acres. His 80 acres is like a large rectangle on the land lying south to north.
In 1925, Mr. and Mrs. Bowen erected a fence right down the middle of Mike Castro's 80 acres dividing the property in half.
Mr. and Mrs. Bowen mistakenly claimed that 40 acres as their land through several changes of ownership until finally to Mike Castro.
The ownership to that 40 acres and building was gained through a process called adverse possession. Mr. and Mrs. Bowen lived there open and notoriously, lived there for more than five years, had a claim of right (innocent mistake), did this peacefully, and there was never an object made by any of the previous owners of Mike Castro's land.
In 1977, there was a court judgement stating that Mike Castro (just to be simple here) had no right to possession of the land or the buildings.
The ownership had been perfected by the court and through an adverse possession. Adverse possession is not a very common way of acquiring property in these modern times. In the past, it was more prevalent.
Did that help?