 Additionally notes taken of a number of his talks were published in various volumes like "Paris Talks" during his journeys to the West.Baháʼu'lláh's "Kitáb-i-Aqdas" and "The Will and Testament of ʻAbdu'l-Bahá" are foundational documents of the Baháʼí administrative order.Baháʼu'lláh established the elected Universal House of Justice, and ʻAbdu'l-Bahá established the appointed hereditary Guardianship and clarified the relationship between the two institutions.