Leonie and Adolphe were minors when their grandfather died and the deBary estate was placed in a trust for them guarded by their father Cecil Lyon. Leonie and Adolphe became the last American deBary heirs as both died early. Adolphe deBary Lyon graduated in 1935 from Harvard College. On September 19, 1937 Adolphe went to a party with a group of friends. As the party left, a young woman began to cross a street and did not notice a car driving towards her. Adolphe saw it and rushed in front of the car pushing the young woman out of the way and was struck. He died at twenty-three years old. His sister Leonie became the sole owner of DeBary Hall with her husband, Benjamin Brewster, a childhood friend. Leonie made more renovations to the family home than any previous owner including putting in a tennis court, new flooring, and a larger bathroom in the Master Suite. The biggest change however was transportation to DeBary Hall. Leonie and her husband were flight enthuasists and constructed a runway and an airplane hangar on the property.