Designed and built in 1938 by inventor Edward Christopher Warren, a former associate of famed inventor Nicola Tesla, this experimental rotary steam engine was installed in the 114-foot shuttle yacht Navette, which had originally been commissioned by financier J. Pierpont “Jack” Morgan and built by Herreshoff Yard in Bristol, Rhode Island, in 1917 for Morgan’s daily commute from Long Island to Wall Street. After Morgan’s death, the yacht was stored for years before being sold to Warren, who planned to use it to test his rotary steam engines, and after installing this engine he moved the yacht down the East Coast from New York’s World’s Fair Marina. During World War II, when licensed engineers required to move steam vessels were in short supply, Warren’s daughter Marjorie was licensed as engineer of certain sized steam yachts and was reputedly the first female to receive such a license. By the early 1950s, Navette had reached its final mooring on a dead-end oxbow created by the 1930s dredging of the Caloosahatchee, and the Warrens became fixtures in LaBelle; for many years following Warren’s death, his daughters Marjorie and Dorothy and their nephew David lived aboard the yacht. Eventually, Marjorie lived in a mobile home near the yacht’s sinking remains. Navette is now submerged in the oxbow that was its final home, and its salvaged engine was displayed at the LaBelle Heritage Museum until the museum relocated to a permanent downtown LaBelle location.