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- Text by Henri Barbusse.
- This song was finished on 1 April 1945 and originally formed, together with the 5 Mélodies françaises, the song cycle 6 Mélodies françaises.
- instrumentation: alto and piano
- text incipit: Je t'écris, et la lampe écoute [I write to you, and the lamp listens]
- tempo: Lent
- time signature: 3/4
- autograph 1: Royal Conservatory Brussels (B-Bc), shelf number P-2-00902. Manuscript with the 5 Mélodies françaises and La Lettre.
- autograph 2: Royal Conservatory Brussels (B-Bc), shelf number BV-03-4085. Manuscript with some corrections that were immediately noted correctly in autograph 1.
- No voice type is specified in autograph 2.