Mainly concerning the Annual meeting of the Synod of the Diocese of Argyll and the Isles, 1920. Many letters from members of the chapter and four letters from Kenneth MacKenzie, Bishop of Argyll and the Isles. Mainly concerning a controversial proposal to elevate St. John's Church, Oban to status as "Cathedral of the United Diocese" possibly affecting Cumbrae's status as "Cathedral of Argyll and the Isles". Includes also: minute of the Synod meeting; a letter from the Earl of Glasgow [George Frederick Boyle]; and three letters from Montagu, Dowager Countess of Glasgow between 1926-1929
Various memoranda, opinions and documents related to the Cumbrae trust and its financial affairs, particularly following Lord Glasgow's bankruptcy of April 1886, as well as discussion over an offer to endow St. Andrews Church, Millport as a separate incumbency.
Includes examples of bookplates bearing Cumbrae Cathedral coat of arms; mottoes and coats of arms of George Frederick Boyle, William John Napier, George Richard MacKarness; front cover of psalter bearing the Cathedral coat of arms; title from spine of leather bound volume Commentaria in S. Pauli epistolas, volume IV; blank certificates of appointment to canonry at the Cathedral and Collegiate of the Holy Spirit.