Thank you very much for this information. This island is a State Park in the Florida Keys. The 280 acres island was purchase in 1919 by wealthy chemist William Matheson and he built a beautiful 2 story home there. The Matheson family brought all sorts of machinery to the island including an old caterpillar bulldozer and rock crusher. You can check out our park page at...https://www.floridastateparks.org/parks-and-trails/lignumvitae-key-botanical-state-park.