Eighteen poetry notebooks representing Matthias' process in composing poems, but containing no complete drafts of poems; files of correspondence with poets; and files representing his activities at Notre Dame - dating chiefly 1971-2010.

Matthias writes that this accession contains "the most important files of letters" and "spiral notebooks going back to 1973 in Little Shelford, UK, in which I find very rough drafts of a large number of poems. Now and then there are also folded in typed worksheets. I had thought at one point to destroy all of these, but then got interested in them myself and therefore thought somewone else might get interested eventually. they also include various out of the way notes that sometimes contextualize the writing I was doing in them. There are no complete holograph poems in these notebooks. I don't work that way. But there are plenty of passages, stanzas, and fragments that anyone acquainted with my work will recognize."

Matthias says that the rest of the accession "contains chiefly two categories of letters and manuscripts: 1. Both sides of a lifetime correspondence with the Swedish scholar and poet Goran Printz-Pahlson. . . . 2. Misc. Notre Dame correspondence with former students re. publication of the poems of Michael Patrick O'Connor, along with early letters from Michael Patrick himself. "