I am excited to follow your discussion on Adhyatman interpretations. 

Particularly because aadhibhautika, aadhidaivika, aadhyaatmika as levels of meaning /interpretation were proposed by me in my PhD dissertation (1998 , covering the proposal of an Indian version  of myth criticism ) for the interpretation of 'myth' ('puraaNa kathaa'). At that time , I did not know that there was already a strand of scholarship using the words such as aadhibhautika, aadhidaivika, aadhyaatmika as levels of meaning /interpretation. Now that I see you scholars using these words taking such a usage for granted, I guess there must be publications with such use of these words. Can you please guide me towards that bibliography. 

I was curious to see adhiyajna included into this group by Prof. Hauben. 

Adhiyajna is not included in groupings such as taapatraya. But it figures in the list brought in by Arjuna in the eighth chapter of the Gita. I wanted to know if Prof. Hauben's inspiration was from this occurence in the Gita only or if there is any other precedence of usage of adhiyajna along side aadhibhautika, aadhidaivika, aadhyaatmika as levels of meaning /interpretation. 

Sri Aurobindo, Kavyakantha Ganapatimuni and others among those who freely resorted to non-Vedanta style aadhyaatmika interpretations of words/concepts of Vedic mantras. 

Anyway thanks for the discussion.