Louis de La Vallée Poussin, on the first page of his Avant-propos to Tome IV of his French translation of the Abhidharmakośa, refers to an English translation of chapter 6 that he made in collaboration with Miss Ridding and E. J. Thomas. Because of this collaboration, he says, the English equivalents were very carefully researched. I have never been able to find where this English translation of this chapter was published. Neither Leo Pruden nor Lodro Sangpo give a bibliographic reference to it in their English translations of Poussin's entire French translation. Can someone point me to it? Thanks.