"are there coincidences in Pluto's realm, amidst the trackless wastes of which I wander lost, a lyreless Orpheus?"

Orpheus and Eurydice
Creative Commons Attribution Share AlikeOrpheus and Eurydice - Credit: Jean-Baptiste-Camille Corot
Pluto/Hades, in classical mythology, was lord of the underworld and God of the dead. Orpheus was a celebrated musician and poet, and master of the lyre. It was said he could move stones and trees by his songs, and cast spells over wild beasts. 

When his wife Eurydice died of a snake bite, he descended to the underworld to bring her back.  His lyre playing so moved Hades that he permitted Eurydice to return to the living, on condition Orpheus walked ahead of her without looking back - a condition he tragically failed to meet.

Creative Commons Attribution Share AlikePluto - Credit: Rufus46
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Symphonic Poem 4 "Orpheus" by Franz Liszt

Orpheus in the Underworld by Jacques Offenbach