Vincent Hartwell admired a valuable book collection on his uncle's bookshelf. To Har t well's surprise, his uncle said that he planned to give the books to Hartwell as a gift and that he could have them at that moment.
Hartwell replied that he was living in a dormitory and had no place to keep the collection. His uncle said, "Consider the books yours. I'll keep them here, and when you're ready for them, come and get them." Hartwell thanked his uncle and left for school. His uncle died a week later.
Hartwell's cousin, Kathleen Lane, inherited the uncle's entire estate. She claimed that the valuable book collection belonged to her. Who was the legal owner, Hartwell or Lane? Explain.