(Well..., I read this -- I'm sure it's important -- but I understood none of it. The one star is not for poor Mallarmé, but for this edition, which is pretty worthless.)
I have the book in my hands - the goodreads photo is from some other (unconnected) book. This book is 34 pages in a large format, published New Writers' Press (in Dublin)/The Menard Press, ISBN 0951375318. It contains only 15 poems, and the translations are quite loose, I believe. There is a brief introduction and some notes, and a painting by the translator. Coffey apparently is an Irish poet and translator "of European stature". Born in 1905, he was close to Beckett and Maritain (in Paris); knew Elliott; taught philosophy in the United States (university), and mathematics at a London school. I was expected a more conventional book, but this will certainly give me a chance to read some Mallarmé in French (with some crutches) quickly....