Thank you for the kind words about the book. The commentary regarding the delay of the Congress is contained on pages lviii - lix of the introduction. The essential points are that on June 1, 1923, the patriarchate was invaded by a mob led by Damianos Damianidis (former church trustee who lost his position due to charges of embezzlement) and Papa Eftim (Efthymios Karahissaridis) who claimed to be Patriarch of a dubious group founded in 1922, the “Independent Patriarchate of the Turkish Orthodox.” The rioters dragged Patriarch Meletios IV down a flight of stairs. Papa Eftim attempted to seize the Patriarchate. The Allied police force was summoned by one of the representatives to the Pan-Orthodox Congress (Gavrilo of Montenegro, future Patriarch of Serbia), and prevented the killing of clergy. It should be noted that Papa Eftim led a second attack on the Patriarchate in December 1923, but was repulsed. He was eventually granted three churches by the government of Kemal Atatürk. Papa Eftim was succeeded in the Turkish Orthodox Patriarchate by his two sons (Papa Eftim II and Papa Eftim III, d. 2002).
In a contemporary report of a British diplomat sent by cipher on 6 June 1923 (with its mispellings), “The Oecumenical Patriarch, Minsignor Meletios, has now requested Allied Police protection as a result of disturbances which have occurred since June 1st. A certain Damiandes is leading agitation aimed at Patriarch’s deposition on grounds that he was not formally appointed by Turkish Government. Damiandes and other leaders among local agitators are reported to have been bribed by Turks with 100 liras per head to agitate against Patriarch and Turks have hired a mob of low class freeks for this pupose at 2 or 3 liras per head. Turkish intention is to nominate a puppet to replace Meletios.”
The same documents describe the confrontation between the delegates and the rioters led by Damianidis. Gavrilo of Montenegro engaged Damianidis directly expressing his “hatred” of the latter’s actions and stating, “what importance could you have vis-a-vis millions of Orthodox?”
Regarding the topic of type of clerical dress recommended by the Congress, no further information could be found beyond the recorded discussions.
In case anyone is interested, I have a recent interview concerning the Congress on the SCOBA-sponsored internet radio program, "Come Receive the Light." http://www.myocn.net/index.php?option=com_content&task=category§ionid=5&id=21&Itemid=97
Fr. Patrick Viscuso