Outstanding as an example of his historical perspective is the Introduction to the Dawn-Breakers. It contains a concise and brilliant history of Islam, to inform the reader concerning the forms and elements which concurred to set the stage on which the deeply moving drama of the Báb's Revelation was played. Many a time, during his table conversation, to illustrate some points, he would accurately quote from that particular book, or from God Passes By, or some other of his writings, often showing surprise or perplexity at the limited information, or lack of it, of some of his listeners. The footnotes of The Dawn-Breakers, some of which are in French, are another example of his talent in the field of historical research. To appreciate the tremendous background of knowledge he possessed at the time of his translation of that book, it suffices to glance at the titles and authors of the fifty-five books he consulted, as listed in the Appendix. In addition, one finds in his own handwriting the genealogy of the Báb, showing connection with Bahá'u'lláh's descendants, and presented on a fivefold sheet of paper twenty-six inches long. The genealogy is prepared with scrupulous care, and shows the ramifications of the families, including names known to every Bahá'í as well as names unknown to the average believer, but which Shoghi Effendi brought to mind with great facility. Always amazing was his inexhaustible memory and the ease with which he recalled episodes, placing personages in their proper positions, with all their particulars of names, backgrounds and degrees of relationship. It was like reliving the spellbound days of my childhood when my aged and learned tutor would narrate the legendary feats of Greek mythology, with gods and people brought alive by his fascinating word pictures.
- Hand of the Cause Ugo Giachery ('Shoghi Effendi – Recollections’)