This poem appears in MacDonald’s A Threefold Cord (1883), where MacDonald is credited as contributor and editor. In this volume, individual authors are not credited. While some have thought that this passage is by MacDonald himself, Nick Page persuasively argues that the poem should be attributed to MacDonald’s friend Greville Ewing Matheson. See Page, Phantastes: Special Annotated Edition (Paternoster, 2008)
Unknown, "Phantastes Chapter 12: A Threefold Cord" (1883). German Romantic and Other Influences. 13.