One should be able to find this poem in the original French here
https://fr.wikisource.org/wiki/Po%C3%A9sies_(Mallarm%C3%A9,_1914,_8e_%C3%A9d.)
If not then Mallarmé's other works are located here
https://fr.wikisource.org/wiki/Auteur:St%C3%A9phane_Mallarm%C3%A9
Here is the poem in English whose French original version I need
Crushed by the overwhelming cloud
Depth of basalt and lavas
By even the enslaved echoes
Of a trumpet without powerWhat sepulchral shipwreck (you
Know it, slobbering there, foam)
Among hulks the supreme one
Flattened the naked mast tooOr that which, furious mistake
Of some noble ill-fate
All the vain abyss spread wideIn the so-white hair’s trailing
Would have drowned miser-like
The childish flank of some Siren.