Subseries B. Correspondence contains letters to Phillips as well as outgoing letters. The majority of the correspondence was received from book collectors, historians, and curators. Of particular interest are letters from Clarence Brigham (American Antiquarian Society), Worthington C. Ford (Massachusetts Historical Society), and Lawrence C. Jenkins (Peabody Museum of Salem). An enclosure in the Jenkins correspondence and a letter from an unidentified "Miss Allen" provide interesting insights into Hawaiian culture.