Robert Kelly co-founded Chelsea Review and edited it from 1957 to 1960. He co-edited Trobar with George Economou starting in 1960 (through '65). Kelly taught at Wagner College in 1960 and '61. His book Red Actions: Selected Poems (Black Sparrow, 1995) reaches back to 1960 for its earlier poems, ending with some poems from '93.
Kelly's papers are at the University of Connecticut but do not seem to include letters dating back to '60.
His first book, Armed Descent, was published in '61.