There is a very interesting essay by Song- Kyong Lee entitled, 'The Eastern Spiritual World and the Dramatic Works of T.S. Eliot with Special Reference to Murder in the Cathedral' that approaches this subject. Lee describes the influence of the noh on Eliot's play through his contact with Pound and by extension Yone Noguchi and Sarojini Naiddu. According to Lee the necessary precursor to 'Murder' was Yeats' attempt at noh, 'At the Hawk's Well,' which was performed at Lady and Sir Bache Cunard's London home on April 2, 1916. Michio Ito danced the role of the hawk. In the same year Pound edited and published Fenollosa's manuscripts. (I would be interested to know more about the fine grains of the timing here.) Pound is said to have brought Eliot to this performance. I can't say whether Yeats was also there. I hope this helps!