This series is the largest in the collection, comprising more than half of the Feinberg material. Feinberg served on the Second Circuit from 1966 through 2011, one of the longest tenures in circuit history, including a term as Chief Judge from 1980 through 1988. He took senior status (a form of semi-retirement) in 1991 and maintained an active hearing schedule until his retirement in 2011. The heart of this series is his case files, which include a number of precedent-setting and noteworthy rulings. A list of cases of particular interest can be found in the note to Subseries III.2.