Baillie genealogy consists of:

Correspondence, itineraries, press cuttings and related items, including letters from his wife Florence Jewel Baillie, his brother Donald Macpherson Baillie, Mona Anderson, Henry Sloane Coffin, William Temple (the Archbishop of Canterbury), Violet Markham, John H Duncan, George Freeland Barbour and Cyril Forster Garbett (the Archbishop of York). Subjects include John Baillie's BBC broadcasts and Church of Scotland and YMCA matters.

Correspondence and related items, including letters from his wife Florence Jewel Baillie, his brother Donald Macpherson Baillie, Mona Anderson, Ian W Fraser, Sir Zwinglius Frank Willis and Henry Pitney Van Dusen. Includes material relating to the World Council of Churches and letters congratulating John Baillie on being appointed Principal of New College. Also includes a paper, 'The Idea of Orthodoxy'.

Correspondence and related items, including letters from Mona Anderson, Reinhold Niebuhr, Hachiro Yuasa and Lazlo Pap. Includes material relating to the Donald Macpherson Baillie's estate, the unveiling of war memorial panels and installation of the Duke of Edinburgh as Chancellor at the University of Edinburgh, the coronation of Elizabeth II and preparations for the World Council of Churches conference.

Correspondence and related items, including letters from Mona Anderson, Thomas Stearns Elliot and Hans-Heinrich Harms. Includes material relating to the World Council of Churches and other ecumenical matters.

Correspondence and related items, including letters from his brother Donald Macpherson Baillie, Mona Anderson, Reinhold Niebuhr, Lewis Legertwood Legg Cameron, George Simpson Duncan, (Henry) Christopher Dawson and Garfield Hodder Williams. Also material relating to the preperation of the British Council of Churches visit to Germany and salaries at the University of Edinburgh.

Correspondence, itineraries, press cuttings and related items, including letters from his brother Donald Macpherson Baillie, Mona Anderson, the Duke of Montrose, William Temple (the Archbishop of Canterbury), George Simpson Duncan, Lewis Legertwood Legg Cameron and Sir Neil John Kennedy Cochran-Patrick. Much of the correspondence relates to Church of Scotland business, particularly visits to churches and congregations as Moderator as well as to John Baillie's BBC radio broadcasts.

Correspondence and related items, including letters from his wife Florence Jewel Baillie, his brother Donald Macpherson Baillie, Mona Anderson, Bertram Christian, Leslie Bannister Walton, William Alexander Curtis, (Henry) Christopher Dawson and Sir Zwinglius Frank Willis (YMCA)

Correspondence and related items, including letters from his wife Florence Jewel Baillie, his brother Donald Macpherson Baillie, Mona Anderson, Bertram Christian, Henry Pitney Van Dusen and Henry Sloane Coffin. Also responses to John Baillie's tribute to Thomas Cockburn in The Scotsman and material relating to the International Missionary Council and to the wedding of Princess Elizabeth (now Elizabeth II).

Correspondence, press cuttings and related items, including letters from his brother Donald Macpherson Baille, Mona Anderson, David Smith Cairns, George Freeland Barbour and Alexander Martin. Many press cuttings relate to John Baillie's work around United States involvement in the Second World War.