師達能檔案原件收藏在Billy Graham Center on the campus of Wheaton College, Wheaton, Illinois.
http://www2.wheaton.edu/bgc/archives/GUIDES/449.htm
解釋了為什麼許多家書是打字的:
John and Elisabeth sent these letters to his family in the United States who would then make a typed copy of the letter and send it to family and friends. Most of the correspondence in this folder are the typed copies, although there are a few handwritten letters.
