One of the aspects of the footnotes of The Letters of Sylvia Plath that I most enjoyed was cross-referencing to letters to which Plath responded. There are very few instances where we have both sides of the letters--the most complete being the letters between Plath and Gordon Lameyer and Plath to Lynne Lawner. Periodically, Richard Norton and Eddie Cohen, to name but two, would quote Plath's words back to her in her letters which was always illuminating. Particularly as these original letters no longer appear to be extant. My intention in doing this work in the footnotes was to help readers in pinpointing those letters to Plath in an archive; to save them time, perhaps. But overall, just to try to get anything relevant to the letter on the page. You will see them each at the bottom of the page, usually formatted the same in the attempt to be both consistent and predictable. For example, "See Richard Norton to SP, 3 March 1953; held by Lilly Library." "See Ly...
Sylvia Plath Info Blog by Peter K. Steinberg. The blog of A celebration, this is.