For assistance and encouragement in conducting the research for this essay, I thank Brad Sabin Hill, head of the Hebrew Section, the British Library; Dr. David Patterson, director of the Oxford Centre for Postgraduate Hebrew Studies, under whose auspices much of the research was conducted; the staff of the Bodleian Library, Oxford; and Michael Grunberger and Peggy Pearlstein of the Hebraic Section, Library of Congress, Washington, D.C. I also thank Dr. Marc Lee Raphael for editorial advice and input on both the research and the article. Above all, I thank Dr. Sherry Levy-Reiner for her scrupulous editorial care and acumen and her continuing support of this research in so many ways.