Skeletal elements of plesiosaurs are among the first fossils of extinct reptiles recognised as such. In 1605, Richard Verstegen of Antwerp illustrated in his "A Restitution of Decayed Intelligence" plesiosaur vertebrae that he referred to fishes and saw as proof that Great Britain was once connected to the European continent. The Welshman Edward Lhuyd in his "Lithophylacii Brittannici Ichnographia" from 1699 also included depictions of plesiosaur vertebrae that again were considered fish vertebrae or "Ichthyospondyli". Other naturalists during the seventeenth century added plesiosaur remains to their collections, such as John Woodward; these were only much later understood to be of a plesiosaurian nature and are today partly preserved in the Sedgwick Museum.