This subseries consists mainly of letters to John Bryant Paine, Jr. from family members, including John Bryant Paine (1870-1951), Louise Rue Frazer Paine, Helen Sumner Paine Dickson, Caroline Satterthwaite Paine Ganson, Julia Lee Paine Wakefield, Louise Frazer Paine Erickson, Charlotte Jakson Paine, Sarah Cushing Paine Forbes, and extended Paine family members. Family letters cover Paine's travels in Massachusetts, California, Florida, Europe, and Africa. They discuss news from family and friends, as well as hunting, fishing, and camping trips. Correspondence also spans Paine's time at Middlesex School and Harvard University, as well as his service in the United States Naval Reserve. Letters from the Paine sisters discuss their lives at Winsor School in Boston and Ethel Walker School in Simsbury, Conn.

Personal correspondence includes letters from John Bryant Paine, Jr.'s school friends and acquaintances, including Charles Benjmain Barnes III, Winthrop Hallowell Churchill, William Oakes Clark, John Malcolm Forbes, Jr., Marcial Primitivo Lichauco, and Stephen Minot Weld.

This subseries consists of material from John Bryant Paine, Jr.'s time attending Harvard University (Class of 1923) and Harvard Business School for two years (Class of 1925). The bulk of the material is from after he graduated and includes fundraising for the 1923 and 1925 class funds, reunions, and alumni information. Also included is ephemera from various recreational activities, including programs for football games aginst Yale, Dartmouth, and Princeton.

This subseries contains material relating to John Bryant Paine, Jr.'s service in the United States Naval Reserve during WWII, including Naval training school, his time at the Naval Auxiliary Air Station at Harvey Point, N.C., Patrol Bombing Squadron 112, and Transition Training Squadron in Norfolk, Va. and Quonset Point, R.I. Material consists of correspodence, duty rosters, muster rolls, and memoranda. Also included are some editions of Breezy Points of TTSA, TTSA Mariner, and the Quonset Kiwi newsletters.

This subseries contains a treatise written by John Bryant Paine, Jr. calling for world disarmament. He discusses the obsolescence of the military as a safeguarding force and its emergence as a danger in the Nuclear Age. The work provides Paine's research, arguments, and plan for immediate disarmament.

This subseries consists of material from John Bryant Paine, Jr.'s role as treasurer and member of the MHS. Included are receipts and acknowledgements of gifts to the MHS from Paine, invitations to MHS events, exhibit and event ephemera, meeting announcements, articles by or about Thomas Boylston Adams, and articles about the MHS and other members. Correspondents include Adams and Stephen Thomas Riley.

Material in this subseries includes files on the attack on Pearl Harbor; America's entry into WWII; the Cold War; political assassinations, mainly the JFK assassination; nuclear disarmament; corporate and government corruption; domestic and global markets; the military industrial complex; police states; weapon development; meteorological, environmental, biological, and chemical warfare; and U.S. actions in Vietnam and Asia. Material consists mainly of newspaper clippings and published articles with Paine's handwritten notes, but the subseries also contains correspondence, printed material, and material relating to Paine's personal life, including recreational activities, family life, and causes he supported.

This subseries contains material relating to actions undertaken by the U.S. government and other U.S. agencies at home and abroad that played roles in major events. John Bryant Paine, Jr. tracked these actions mainly through newspaper clippings. Topics include assassinations; the weapons industry, including laser-guided missiles, chemical warfare, and anti-personnel explosives; the military industrial complex; war profiteering; meteorological warfare, including rainmaking and cloud seeding; environmental warfare; drug trade profiteering; wiretapping; nuclear testing and the arms race; the growth of state power in the name of national security; U.S. presence and actions in Vietnam and Asia; government disruption in South America; and attempts to sabotage peace with the Soviet Union. Material on Hugh Bryan Hester includes correspondence, exchange of news article between Paine and Hester, and articles written by Hester.

Material on the assassination of JFK mainly includes newspaper clippings and magazine articles that detail the event, analyze the evidence and findings of the Warren Commission, and discuss popular theories about the lead-up to the assassination, possible key players and perpetrators, and its after effects. These include multi-shooter theories, discrepancies in the evidence, and possible local, U.S., and foreign government involvement. Some related material concerns the assassination of Robert F. Kennedy.

This subseries mainly consists of newspaper clippings relating to the attack on Pearl Harbor. Many articles explore the advance knowledge theory which argues that the U.S. government, or Franklin Roosevelt, had prior warning of the attack and did nothing to stop it so the U.S. had a reason to finally enter WWII. Also included is correspondence with Husband Edward Kimmel and Robert Alfred Theobald.

Material in this subseries explores many of the same topics found throughout Series III, including weapons development, nuclear energy, civil defense policies, military spending, the military industrial complex, U.S. actions in Vietnam, the loss of civil liberties and increase in state power, and impacts of capitalism.

This subseries contains materials relating to U.S. involvement in Vietnam throughout the 1960s and 1970s. The bulk of the material is correspondence from Hugh Bryan Hester. Letters consist mainly of articles exchanged but also include thoughts and opinions on various topics directly or loosely connected to Vietnam and Asia. Many topics recur throughout the collection. Also included are articles written by Hester, material from organizations and movements they supported, and some personal news.