Kenneth Burke, “The Poetic Process,” Counter-Statement, 3rd revised ed. (1931; reprint, Berkeley: University of California Press, 1968), 45–62; originally published in The Guardian 2 (1925): 281–94
In a 01 Dec 1940 letter to Malcolm Cowley, Burke reflected on the writing of The Poetic Process and its relationship to Psychology and Form:
that winter  I stayed at Andover, I wrote two essays, Psychology and Form and The Poetic Process; it was my intention to round these off with third, On the Sublime. I began it, then ran into The Meaning of Meaning [by C. K. Ogden and I. A. Richards, 1923], and was so knocked over that I was unable to write the third essay. And it was not until the Philosophy of Literary Form item, the monograph by that name in the forthcoming collection, that I was able to treat of the material for that third essay, though it is there in a much altered state, affected by all that has intervened.