Matthias, an editor and teacher, as well as a prolific poet, has written some forty books of poetry, translation, scholarship, and fiction. His most recent volume is a book-length version of his memoir, "Living with a Visionary," which was widely read when it appeared in The New Yorker. That account of his late wife Diana's struggle with Parkinson's finds a companion here in "Hacheston Halt," about the poet's early visit to Diana's house in Suffolk.