| Field | Explanation |
| Date | Date of the letter. |
| Nom | Correspondent's name. |
| HP | Direction of the letter: signals a letter addressed to Poincaré, indicates a letter written by Poincaré to the indicated correspondent. |
| Scan | Links to digitized images of the manuscript. |
| Début | Beginning of the letter, linked to a transcription in XHTML unicode (cf. the FAQ), if one is available. |
| Source | Source of the manuscript. Institutional addresses are listed here, along with the letter distribution. |
| Vol | Volume of the Correspondence of Henri Poincaré in which the letter is (or will be) published. |
| Code | Explanation |
| AC | Autograph card, unsigned |
| ACS | Autograph card, signed |
| AD | Autograph document |
| ADft | Autograph letter draft, unsigned |
| ADftS | Autograph letter draft, signed |
| AL | Autograph letter, unsigned |
| ALS | Autograph letter, signed |
| LS | Autograph letter, signature only |
| ALX | Autograph letter, photocopy |
| ALSX | Autograph letter, signed, photocopy |
| PTrL | Printed transcription of a letter |
| PD | Printed document |
| TD | Typed document |
| TrD | Transcribed document |
| TDft | Typed letter draft, unsigned |
| TDftS | Typed letter draft, signed |
| TL | Typed letter, unsigned |
| TLS | Typed letter, signed |
| TGM | Telegram |
