The Title Voiceless Shadow comes from the last stanza

of the classical poem The Vanishing Race by Ella Higgenson (1862-1940).

             "So mutely, uncomplaining they go!
  How shall it be with us when they are gone,
  When they are but a mem'ry and a name?
May not those mournful eyes to phantoms grow---
  When wronged and lonely, they have drifted on
  Into the voiceless shadow whence they came?"
                   Ella Higginson  ©