The file includes lectures, 1937-[1966], dealing with the significance and symbolism of various elements of Masonic ceremony, including significant words, allegoric phrases and the specific colours and symbols used in designs within Masonic temples, as well as some descriptions of Masonic rituals and rites. Some lectures also detail the lives, work and teachings of specific historical figures associated with Masonic ideals, whilst others address Masonic philosophy and practices, mainly in relation to its spiritualism, as well as associated ideologies.