After at­tend­ing a re­viv­al meet­ing by Ru­ben Arch­er Tor­rey and Charles M. Al­ex­and­er, Hark­ness be­came Al­ex­and­er’s pi­an­ist. He came to Christ short­ly ther­ea­fter (on a bi­cy­cle, he said), and made sev­er­al round the world tours with Tor­rey and Al­ex­and­er. Hark­ness was es­pe­cial­ly well known for his prog­ram The Mu­sic of the Cross, and as the au­thor of cor­res­pond­ence courses in hymn play­ing. He wrote over 2,000 hymns and Gos­pel songs in his life­time. His works in­clude:

• Ruben Arch­er Tor­rey, 1929

• Erickson, p. 306
• Hall, pp. 417-9
• Hustad, pp. 252-3
• Osbeck, pp. 145-6

1. Love God’s Word
2. I Want to Be True © 1926
3. Music in the Heart © 1926
4. Only Believe and Live © 1930
5. Send a Great Re­viv­al, Lord © 1928
6. There Was a Heart © 1926
7. Wages of Sin Is Death, The © 1926
8. Why Should He Love Me So? © 1925
9. Will You En­list? © 1926
10. Wonderful Grace © 1926
11. Yet a Lit­tle While © 1925

1. At the Foot of the Cross
2. Calling © 1926
3. Carry Your Bi­ble
4. Cross, The © 1926
5. Evening and Day Dawn © 1931
6. Far from God, Away from Je­sus
7. He Wants a Poor Sin­ner Like Me
8. He Will Hold Me Fast
9. Hide God’s Word in Your Heart
10. Huerta
11. I Have a Sav­ior
12. I Need to Be Filled
13. I Would Draw Near­er to Je­sus
14. In Je­sus
15. Long Ago © 1926
16. Meet Me in the Home­land
17. Memories of Mo­ther
18. My Sins Are For­giv­en © 1905
19. No Long­er Lone­ly
20. Old Time Way, The
21. Somebody Came and Lift­ed Me
22. Shadows
23. Sometime!
24. Soon Will Our Sav­ior from Hea­ven Appear
25. Such Love © 1928
26. ’Tis Je­sus
27. Traveling Home
28. Trusting Je­sus, Won­der­ful Guide
29. When I See My Sav­ior
30. When the Sha­dows Flee Away © 1923
31. Why Not Set­tle It Now? © 1926
32. Why Should He Love Me So? (1924)
33. Will You Take Je­sus To­day?
34. Wonderful Love (1922)
35. Yielded © 1926