'Selected letters etc written or received by Clyde R. Cameron and letters omitted from previous volumes': Volume 15, various dates and 1 April 1990 to 30 September 1990
'Selected letters etc written or received by Clyde R. Cameron and letters omitted from previous volumes': Volume 16, various dates and 1 October 1990 to 28 February 1991
'Selected letters etc written or received by Clyde R. Cameron and letters omitted from previous volumes': Volume 17, various dates and 1 March 1991 to 31 July 1991
'Selected letters etc written or received by Clyde R. Cameron and letters omitted from previous volumes': Volume 18, various dates and 1 August 1991 to 31 December 1991
'Selected letters etc written or received by Clyde R. Cameron and letters omitted from previous volumes': Volume 19, various dates between June 1947 and December 1978
'Selected letters etc written or received by Clyde R. Cameron and letters omitted from previous volumes': Volume 20, various dates between January 1979 and February 1991
'Selected letters etc written or received by Clyde R. Cameron and letters omitted from previous volumes': Volume 21, various dates and 1 January 1992 to 30 July 1992
'Selected letters etc written or received by Clyde R. Cameron and letters omitted from previous volumes': Volume 22, various dates and 1 August 1992 to 31 March 1993
'Selected letters etc written or received by Clyde R. Cameron and letters omitted from previous volumes': Volume 23, various dates and 1 April 1993 to 28 February 1994
'Selected letters etc written or received by Clyde R. Cameron and letters omitted from previous volumes': Volume 24, various dates and 1 March 1994 to 31 July 1994