Do You Remember The Once-ler?

Everyone knows the story of The Once-ler. If you ask anyone in Thneedville, they'll tell you that he's the only person left who knows what happened to the trees. How he chopped down hundreds of trees and stomped upon the beauty of nature to make a quick buck. Everyone remembers the invention of the Thneed, the revolutionary product that could do the job a thousand things. Everyone knows that he lives alone in his Lurkim, far outside of town where the grass never grows.

Yes, we all remember The Once-ler. But does anyone know him? The man he used to be?