A provident father

A rich man had one daughter. All the young men the city wanted to marry her. The rich man did not want his daughter to marry anyone. He was frightened. "When I die", he thought, "my daughter will have all my money. Her husband may kill me to get my money."
Some young men came to his house. The rich man said:
"You can not marry my daughter. She is too young, she is not twenty - one"
On her twenty first birthday, the daughter said: "Father, I want to be married. I am going to find a husband".
"No, you are not!" her father said. He took her hand and pulled her to the top of the house. He pushed her into a room and locked the door. "You will stay there", he said, "until all the young men in the town are married".
The next day he asked all the young men to come to his house. "My daughter is lost," he said, "The man who finds her may marry her."
For several weeks all the young men looked for the girls but they did not find her. "Perhaps she is dead," they said, and they stopped looking. Several years passed. The young men married other girls. Only one of them did not find a wife.
The rich man saw him and said: "Not married yet? Find yourself a wife, my friend. Be happy!"
Then he said, "My friend, I want you to be happy. Here is some money. Now you can get a wife. On your wedding day I will give you more money. I will give you a house. Your marriage will be a happy one".
The young man went home and thought about this for a long time. A few weeks later he sent a message to the rich man. "I am getting married tomorrow. Please come to my wedding".
The rich man laughed happily and ran up to his daughter's room. "You can come out now", he said, "I am safe. They are all married".
The next day he went to the wedding. He took his daughter with him. All the people were surprised. They thought she was dead.
The rich man walked up to the young man. "Where is your bride?" he asked.
The young man smiled. "There" he said and took the daughter's hand. "You have found her for me".