Algernon Charles Swinburne's poem laments the death of composer Richard Wagner as a loss felt by the entire natural world. The speaker insists that with Wagner gone, no voice remains to “rebuke or reprehend” the descent of darkness; the earth itself grieves. Wagner’s art gave speech to wind, thunder, oceans, and the hidden forces that move the planet—what Swinburne calls “the world’s great heart.” Now that music is silent, the world seems diminished. The refrain “Mourning on earth” echoes like a planetary sigh.
The mood is one of majestic sorrow mingled with shuddering wonder. Wagner is figured as a sorcerer who conjured sound from the abyss, a “mage of music” whose chords made listeners feel a divine doom rising like dawn from the sea—terror and joy mixed. He made the roar of tempests and ocean hollows into unbearable sound, received only by ear and heart. Personal grief becomes a cosmic silence.