I extend appreciative thanks to Professor Muriel B. Ingham, of California State University, San Diego, who acted as interpreter on our visit to Wittenberg, Eisenach, Wartburg Castle, and Eislebenn, Enabling me to use many details about Martin Luther's life that would not have been available otherwise.
I am grateful to her and to Helen Farr, teacher of German at California State University, San Diego, for translating Ernst Kroker's book, Katherina von Bora, specifically for my use.