TCG Letter #1118

Tolkien and the Great War, p. 33 ('Convention bids me...')

The J.R.R. Tolkien Companion and Guide - Chronology (2017), p. 124 (summary). (The T.C.B.S. was began during the Summer term 1911 at King Edward School. See various entries re. T.C.B.S. and TCBS.)

The J.R.R. Tolkien Companion and Guide - Reader's Guide Part 2 (2017), pp. 1281-88 (entry for T.C.B.S.)