Sentence:  ... the accidents of itinerary — everything that can be overheard or spied out: everything (in a phrase he used in one of his poems) between the <WSD>foremath</WSD> and the aftermath, the early growth and the after growth of the intended harvest. 
Meaning of the word marked with <WSD> tags:  A first mowing; that which is gleaned from a first or prior mowing.