As Dr. Esslemont himself recognized, the Faith entered a
new phase of its history after the ascension of ‘Abdu’l-Bahá.
The result is that the author’s views, some of them written
prior to 1921, no longer, on certain aspects of the subject, correspond
to the evolutionary character of the Faith. His treatment
of events and social conditions then existing, moreover,
no longer appears fully relevant. Unavoidably, a few errors of
fact had entered his text, while his explanation of the stations
of the Báb and of ‘Abdu’l-Bahá have been replaced in the
minds of Bahá’ís by the authoritative interpretations since
made by the first Guardian of the Faith, Shoghi Effendi.