The discovery of much better specimens of "Iguanodon bernissartensis" in later years revealed that the horn was actually a modified thumb. Still encased in rock, the Maidstone skeleton is currently displayed at the Natural History Museum in London. The borough of Maidstone commemorated this find by adding an "Iguanodon" as a supporter to their coat of arms in 1949. This specimen has become linked with the name "I. mantelli", a species named in 1832 by Christian Erich Hermann von Meyer in place of "I. anglicus", but it actually comes from a different formation than the original "I. mantelli"/"I. anglicus" material. The Maidstone specimen, also known as Gideon Mantell's "Mantel-piece", and formally labelled NHMUK 3741 was subsequently excluded from "Iguanodon".