Known sourcecanonical
"'T was whisper'd in heaven, 't was mutter'd in hell, And echo caught faintly the sound as it fell; On the confines of earth 't was permitted to rest, And the depths of the ocean its presence confess'd."
Catherine M. Fanshawe / Enigma. The letter H.
Enigma. The letter H.
Bartlett's Familiar Quotations, 9th ed. (Little, Brown, 1905), public domain