"Let your religion be less of a theory and more of a love affair."
Gilbert K. Chesterton
There were many different Galukojis made from different variations of leather, wood, feathers and beads. The instruments were used during the early - mid 20th century. I cannot decide if the purpose of the instrument was of a spiritual or political nature based on the research I have found on both the Met's website and "Art and Oracle: African Art and Rituals of Divination" by Alisa LaGamma and John Pemberton. An oracle would use the instrument during a ceremony that would help in determining the guilt or righteousness of an accused person.
While the purpose is something to ponder, there is no denying the powerful nature of the Pende people's art and mask. I snapped a picture (flash off of course!) during my last visit to the VMFA.