 Others may have been based on far older fossils of plesiosaurs, which are thought to have informed a unique depiction of a dragon in this book that departs noticeably from the classically slender, serpentine dragon artwork of the era by having a barrel-like body and 'paddle-like' wings.According to some researchers, this dramatic departure from the typical dragon artwork of this time, which is thought to have been informed by the Lindwurm, likely reflects the arrival of a new source of information, such as a speculated discovery of plesiosaur fossils in quarries of the historic Swabia region of Bavaria.Eighteenth century skeletal reconstructions of the unicorn are thought to have been inspired by Ice Age mammoth and rhinoceros bones found in a cave near Quedlinburg, Germany in 1663.