On March 12, 1923, the beloved Guardian addressed a letter
to the Baha'is throughout America, Great Britain, Germany, France, Switzerland,
Italy, Japan, and Australia emphasizing the responsibility of believers in
spreading the Teachings and in establishing local assemblies in all cities
having nine or more adult Baha'is. In the same letter the institution of the
National Spiritual Assembly was presented in detail.
During Ridvan of that year there were elected for the first
time local and national institutions having the functions of spiritual
assemblies as we now recognize them in East and West. Horace Holley was elected
a member of the New York Local Spiritual Assembly and of the National Spiritual
Assembly of the United States and Canada that year. He has continued his
services on the National Spiritual Assembly for thirty-six years without
interruption, and has been its secretary since 1924. He has therefore been an
active participant in the evolution of the Baha'i community throughout all its
stages of administrative development following the ascension of 'Abdu'l-Baha,
including the two seven-year teaching plans formulated by the Guardian, the
celebration of tine Centenary of the Bab, the celebration of the Centenary of
Baha'u'llah, and the Guardian's World Crusade up to the present hour. …Read
more
-U.S. National Spiritual Assembly (Baha’i News, January
1960)