| The Mentor: Julius Cæsar, Vol. 6, Num. 2, Serial No. 150, March 1, 1918
George Willis Botsford | |
| The Mentor: Makers of American Art, Vol. 1, Num. 45, Serial No. 45
J. Thompson Willing | |
| The Mentor: Makers of American Fiction, Vol. 6, Num. 14, Serial No. 162, September 1, 1918
Arthur Bartlett Maurice | |
| The Mentor: Makers of Modern Opera, Vol. 1, Num. 47, Serial No. 47
Henry Edward Krehbiel | |
| The Mentor: Napoleon Bonaparte, Serial No. 38
Ida M. Tarbell | |
| The Mentor: Painters of Western Life, Vol 3, Num. 9, Serial No. 85, June 15, 1915
Arthur Hoeber | |
| The Mentor: Photography, Vol. 6, Num. 12, Serial No. 160, August 1, 1918
Paul Anderson | |
| The Mentor: Reclaiming the Desert, Vol. 6, Num. 17, Serial No. 165, October 15, 1918
C. J. Blanchard | |
| The Mentor: Rembrandt, Vol. 4, Num. 20, Serial No. 120, December 1, 1916
John C. Van Dyke | |
| The Mentor: Russian Music, Vol. 4, Num. 18, Serial No. 118, November 1, 1916
Henry T. Finck |
