1848 - Mullá Ḥusayn and 71 fellow Bábís are besieged at Fort Tabarsi, eventually to be surrounded by twenty thousand soldiers.
From the time when Mulla Husayn was assailed by his enemies to the time of his martyrdom was a hundred and sixteen days, a period rendered memorable by deeds so heroic that even his bitterest foes felt bound to confess their wonder. On four distinct occasions, he rose to such heights of courage and power as few indeed could attain. The first encounter took place on the twelfth of Dhi'l-Qa'dih,
(Shoghi Effendi, The Dawn-Breakers, p. 382)
No less than ninety of the companions were wounded that night, most of whom succumbed. From the day of their arrival at Barfurush to the day they were first attacked, which fell on the twelfth of Dhi'l-Qa'dih in the year 1264 A.H., to the day of the death of Mulla Husayn, which took place at the hour of dawn on the ninth of Rabi'u'l-Avval in the year 1265 A.H., the number of martyrs, according to the computation of Mirza Muhammad-Baqir, had reached a total of seventy-two.
[1 October 10, 1848 A.D.] [2 February 2, 1849 A.D.] (Shoghi Effendi, The Dawn-Breakers, p. 382)
1912 -Abdul- Baha was in San Francisco
In addition to the gatherings of the friends at the Master's residence, there were also meetings outside, which demonstrates the grandeur and power of the Centre of the Covenant. One took place at a high school in Berkeley where the Master spoke on the reality of God and the proofs of the revelation of the Manifestations and their teachings. Many from the area were enthused with His talk and came afterwards to receive illumination from Him.
Another meeting was held at the Open Forum in San Francisco. Although the audience was composed mostly of philosophers and professors, they were all humbled by the talk. The Master's profound words contrasted the philosophy of the East with that of the West, elucidated the power beyond nature and explained the inherent distinction between mankind and other creatures. He concluded with the assertion that if philosophers believed that the highest perfection was not to believe in abstract and spiritual truth, it would be preferable to go to the cow, who, without any formal training, already had this attribute. When the Master uttered these words, everyone burst into laughter. This kind of humor, delivered in such a light-hearted manner, is popular and accepted by the Americans and so brought smiles and joy to the audience. At the conclusion of the Master's talk, when a philosopher stood up, several were heard to say to one another that the cow takes the lead in not believing in intellectual thought. The result was that everyone, even the philosophers, bore witness to the might of the divine teachings and influence of the words of 'Abdu'l-Bahá. Indeed, the Master's address provided a perfect and decisive proof for such people.
1932- "The day will come when the Cause will spread like wildfire when its spirit and teachings will be presented on the stage or in art and literature as a whole. Art can better awaken such noble sentiments than cold rationalizing, especially among the mass of the people." 
From a letter dated 10 October 1932 written on behalf of the Guardian to an individual believer
(The Universal House of Justice, Ridvan 153, 1996)