Sitting on a shelf in the Lighthouse library to exchange information, Rainbow declared the answer to be 'Kites!' Producing research to show that people have been flying kites for hundreds of years the others readily accepted that the phantom flying machine must have indeed been a kite.
Swiftly moving on, Poet and Barnacle revealed a whopping amount of information about the Water Poet's exploits.
Unfortunately Star and Pearl could only hunt out a few curious snippets about Spring Heeled Jack. When Crabby asked if any of the merry crew could prove that Jack actually existed, Pearl swiftly asked if any of the others could prove that he didn't exist. As nobody could offer any proof either way it must remain a possibility that Jack was a real character in history.