I can not find the drawing, I can find a citation.
"Take, for instance, the increase in body size which is one of the most striking trends in popular presentations of the horse series. In fact, the increase in size between
Hyracotherium and
Equus was by no means gradual, constant, or progressive. An analysis by MacFadden (1987) of 24 ancestral-descendant species pairs revealed that 19 showed body-size increases.
However, the remaining 5 lineages showed size decreases. There are even lineages within the horse family tree that show size decreases followed by reversals back to increased size (MacFadden 1984; Webb and Hulbert 1986; Hulbert 1988)."
http://www.truthinscience.org.uk/ti...evolution-mainmenu-65/55-horse-evolution.html
Of course the new information means they have to rework the theory. What I am pointing out is how reluctant evolutionists are to let go of the old theory esp when the visual aids are so appealing. Even when they have been shown to not be true. Even Haeckel's embryo drawings are still in use even though it was shown to be far from accurate a long time ago. It reflects peoples mistaken ideas of evolutionary theory.