EN 
| Letter | Year |
|---|---|
| May 1959 – VOL. 40, No. 4 – Conserving and Using Our Open Spaces | May 1959 |
| April 1959 – VOL. 40. No. 3 – On Building Character | April 1959 |
| March 1959 – Vol. 40, No. 2 – About Style in Writing | March 1959 |
| February 1959 – Vol. 40, No. 1 – Planning for Efficiency | February 1959 |
| November 1958 – VOL. 39, NO. 11 – On Reading Profitably | November 1958 |
| October 1958 – VOL. 39, No. 10 – On Being a Follower | October 1958 |
| September 1958 – VOL. 39, NO. 9 – Canada and the United States | September 1958 |
| August 1958 – VOL. 39, No. 8 – What Use is History? | August 1958 |
| July 1958 – Vol. 39, No. 7 – On Preparing a Speech | July 1958 |
| June 1958 – VOL. 39, NO. 6 – The Natural Resources of Canada | June 1958 |