Poem Recognition Contest

The first prize is a free read of the Shit Creek Review.

The poem in question is an epigraph to another poem by Jean-Marc Bernard (b 1881 d in action 1915). His poem is called De Profundis, and the title is followed by a four-line epigraph from another poem which seems to be called 'Quelques Essais'. So who wrote the lines 'Le nécessaire...Votre œuvre inachevé'? Hein?

De Profundis

Le nécessaire de ma raison de vivre,
O morts, je l’ai trouvé,
Et je sais aujourd’hui que je devrai poursuivre
Votre œuvre inachevé

Quelques Essais

[Bernard's poem then begins...]
Du plus profound de la tranchée,
Nous élevons les mains vers vous,
Seigneur! ayez pitié de nous
Et de notre âme desséchée...

[Then follow four more stanzas of Bernard's poem.]

PS. We don't know the answer to the question of who wrote the epigraph. We're hoping you do.