In the introduction to the book It Began With A Roar, Dr. Charles Schroeder said of Dr. Harry: "I have never met a man with Doctor Harry's animal-like persistence, or his tenacity of purpose to do the job and carry it to completion, come hell or high water. If it is selfish to make personal sacrifices in fortune and energy for the sole reward of seeing a dream come to fruition, then Doctor Harry was a very selfish man. His goal was so clear, and the road was so narrow and straight that he would not permit any form of deviation....He planted the seed. We did his bidding with further interference. He knew how to pull the most out of everyone who would help, and you felt good about it....The world has known no more stubborn or determined man."