For most artists it would be a challenge to draw a recognizable head from this odd angle:
Sullivant goes much further, fearlessly distorting the head with a comical hodge podge of bizarre shapes. Yet, it is still persuasive.
And look at the liberties Sullivant takes with this sleeping pig, or the unorthodox perspective on the chicken's butt in the air:
In this next drawing, Sullivant doesn't need to show a face; he gives us all the information we need with that wild beard and stooped posture:
Here, we see an elephant who has inadvertently hurt the feelings of the giraffe:
This could be my very favorite drawing of a crying giraffe:
And here we see Sullivant's wicked cave boys tormenting some poor dinosaur:
We can see from the original how Sullivant shaped the dinosaur as he went along, scratching out some of the lines of the head to achieve the structure he wanted:
A stumbling, upside down dinosaur, mid-air and foreshortened-- now that's doing it the hard way!