Geology isn’t the only discipline that produced spectacular illustrations in the 1800s, and the Iguanodon isn’t the only extinct animal we’ve reconstructed differently throughout time. Here are an assortment of 19th century illustrations of extinct creatures.
https://gizmodo.com/this-geological-field-notebook-is-an-elegant-look-at-mo-1588374224
https://gizmodo.com/illustrations-of-the-iguana-toothed-dinosaur-1574184389
https://gizmodo.com/strange-19th-century-drawings-of-dinosaurs-and-other-ex-1593696125