Art (left) for a cartoon published during the early 1900s, probably in a newspaper.
Below, a rough sketch of a Tyrannosaurus drawn by Larry Ivie on a moving train; and a Tyrannosaurus pencil drawing begun (but never completed) ca. 1956 by artist Victor Fabian, Sr.
Not an original piece of art, unfortunately, but a real autograph by Czech artist Zdenek Burian (below).
Also (below) on the “black and white art walls,” an early digital Deinonychus created by Richard F. Wheeler and an original magazine advertisement for a 1923 silent movie.