Most of Bradstreet's letters were written to his sister Consuelo and describe the opening days of the Second World War on the home front, Bradstreet's baptism of fire as a chaplain at an Army camp in Oregon, and his subsequent adventures overseas in England and Hawaii. The correspondence ends with his return to Jesuit mission work in California. Also here are several letters to Bradstreet from soldiers with whom he remained in touch, which give the average G.I.'s view of the war effort, including the liberation of Dachau (Folder 4, 1944).

Folder 2 (1941): This folder contains telegrams concerning the illness and death of Bradstreet's mother.

Folder 3 (1942): In these letters Bradstreet describes for sister Consuelo wartime conditions in Los Angeles, including blackouts and the descent of the armed forces on colleges(April 24), fundraisers for civil defense (March 16, May 5), and gasoline and food shortages as well as the drafting of university students (December 19). He also mentions Jesuit missions in Alaska (March 24).

Folder 4 (1943): These letters focus on Bradstreet's first duties as a chaplain at Camp White, Oregon. He speaks of desertions and prison escapes (May 12), WACs (August 28, October 14), the Marines' public relations machine (September 11), a lieutenant's stories of Iceland (September 29), and of eating Thanksgiving turkey originally meant for Japanese American internees at Tule Lake (November 26). He also describes his routine at Harvard's Chaplains' School (July 22 and 30) and has to settle for hospital rather than combat duty because of weak eyes (October 14).

Folder 5 (1944): Many of these letters contain details of life in wartime Britain, such as blackout, paper and food shortages, and the people's attitudes toward American soldiers. Bradstreet also describes tourist sites and items of interest: Stratford, English architecture, cathedrals, etc. A letter of July 16 speaks of pilotless bombs and of refugees leaving London. Leonard Collett gives Bradstreet a moving eyewitness account of the aftermath of the liberation of Dachau (April 24, 1944), and Bradstreet writes of the heroism of D-Day soldiers (June 13).

Folder 6 (1945): These letters cover the end of the war in Europe (May 21 and 31) through Bradstreet's posting to Honolulu in November. Many of the letters describe conditions in Hawaii, which Bradstreet found a disagreeable clip joint, at least for tourists (November 15 and 26). He speaks of meeting Japanese American veterans on the boat over, one of them up for the Congressional Medal of Honor (November 7 and 8), voices his concern over European Communism (May 21, October 22), and tells of Father Peter, with the Molokai lepers since Father Damien's time (December 4).

Folder 7 (1946): Bradstreet continues reporting on life in Hawaii, mentioning the tensions between soldiers and locals (February 18), the tidal wave (April 3), and high prices in Waikiki (June 25). He tells of Tom Cunningham, S.J.'s mission on Little Diomede Island in Alaska (February 14), the sad conditions in China according to another Jesuit (February 25), and Father Zimmerman's (Missouri Province) work on the Manila war crimes trials (June 8). In the last letter he relays MacArthur's supposed belief that only Catholicism can fill the religious vacuum in Japan.

Folder 8 (1947): These letters deal mainly with family disputes. On August 9 Bradstreet mentions his trip to visit ex-servicemen with whom he has been corresponding.