Eleonore and Robert Watrous were friends and students of Dr. de Lange. In 1994, they completed the compilation and editing of letters that he had sent to his worldwide practice and published a remarkable book, Principle and Practice, that presents these letters for all to read and enjoy.
They also also compiled two additional volumes to share more of his writings. The first of these (111 pages) presents 30 Articles that were previously published in the Christian Science Sentinel and the Christian Science Journal. The second (151 pages) presents all of Dr. de Lange’s Lectures written and delivered by him over more than two decades.