| The Mentor: Famous English Poets, Vol. 1, Num. 44, Serial No. 44
Hamilton Wright Mabie | |
| The Mentor: Furniture and its Makers, Vol. 1, Num. 30, Serial No. 30
Charles R. Richards | |
| The Mentor: Game Animals of America, Vol. 4, Num. 13, Serial No. 113, August 15, 1916
William T. Hornaday | |
| The Mentor: Game Birds of America, Vol. 1, Num. 34, Serial No. 34
Edward Howe Forbush | |
| The Mentor: Great American Inventors, Vol. 1, Num. 29, Serial No. 29
H. Addington Bruce | |
| The Mentor: Guynemer, The Wingèd Sword of France, Vol. 6, Num. 18, Serial No. 166, November 1, 1918
Howard W. Cook | |
| The Mentor: Historic Spots of America, Vol. 1, Num. 32, Serial No. 32
Robert McNutt McElroy | |
| The Mentor: Holland, v. 2, Num. 6, Serial No. 58 / May 1, 1914
Dwight L. Elmendorf | |
| The Mentor: Italy Under War Conditions, Vol. 6, Num. 23, Ser. No. 171, January 15, 1919
E. M. Newman | |
| The Mentor: Joan of Arc, v. 3, Num. 22, Serial No. 98, January 1, 1916
Ida M. Tarbell |
