Knapp incorporated his teachings into an early book draft, "The Destiny of The Mother Church", following which the Christian Science Board of Directors wrote a six-page letter in February 1948 politely rebuking numerous points they regarded as at variance from Eddy's teaching. Knapp then withdrew the book, but instead of revising it as they proposed, he disregarded their comments and expanded it for private issue instead, leaving it in trust with approximately $100 million in 1990s dollars, acquired by way of his marriage to Eloise Mabury (m. March 27, 1918), to revert to the Church of Christ, Scientist if it ever published his work as "authorized literature".