Yes, access to Minister's Island depends on the tide - high tide means boat access and low tide enables driving "across the ocean floor". Out timing enabled driving across to the island where a wonderfully informative woman guided our tour. Van Horne was a brilliantly creative man who made his fortune in railways. Due to insomnia, he had a room on the main floor of the house where he could paint and not disturb anyone else. His artistic talents are also seen in the nursery where he painted a border. He bred award winning cattle and designed a system to have milk piped to the house from the barn which is a few minutes drive away from the house.