Series I: Subject Files. The bulk of this series contains ephemera associated with the Spanish Civil War, including certificates of honor and documents of affiliation with the Spanish Communist Party and the International Brigades. Other subject files include anniversary programs and newsletters from the Abraham Lincoln Brigade Archives, the Veterans of the Abraham Lincoln Brigade (both the New York and Bay Area posts), and the 60th Anniversary Tribute in Spain in 1996. Of note is a transcript of an oral history interview done by Art Day in 1986, addressing Goddard's involvement with the labor movement in the 1930s and 1940s.

Series II: Correspondence. Each folder in this series contains both incoming and outgoing correspondence between the recipient and Goddard. The recipient's name titles each folder. Many of the letters written in Spanish include Goddard's own translation. The bulk of the letters, mostly to and from veterans of the Spanish Civil War, is between Goddard and former veteran John V. Murra. Murra's correspondence also contains clippings and other items that he sent to Goddard. Notable are letters between Goddard and José Antonio Valledor Alvarez, a former commander of the 15th International Brigade.