The arrangement in this series reflects the arrangement of the materials prior to their deposit at Newcastle University, groupings which were likely to have been made by Mary and her family. As a result, letters from specific individuals or related to certain events may be found in multiple sub-series. The sub-series are as follows:

CPT/2/1 - Personal and appointment diaries CPT/2/2 - Personal papers and ephemera CPT/2/3 - Letters to Mary from various correspondents grouped by date CPT/2/4 - Letters to Mary grouped by subject or author CPT/2/5 - Letters to Mary from Hugh Bell and Florence Bell nee Olliffe CPT/2/6 - Letters to Mary from Herbert Richmond and Elsa Richmond nee Bell CPT/2/7 - Letters to Mary from Hugh Lowthian Bell [Hugo] and Frances Bell nee Morkill CPT/2/8 - Letters to Mary from George Otto Trevelyan and Caroline Trevelyan nee Philips CPT/2/9 - Letters to Mary from Elizabeth Trevelyan nee Van der Hoeven CPT/2/10 - Letters to Mary from Sylvia Henley nee Stanley CPT/2/11 - Letters to Mary from various family members