Following more research, it has been possible to find more information about the early years of the women's singles event at the Closed French Championships, including several additional scores. Below is the new list of known finalists and scores, with each year accompanied by either a "Verified" or "Not verified" depending on the reliability of the source(s). (The venue tended to vary in the early years and a Challenge Round was in force in later years.)
FI: Adine Masson d. Mme P. Girod 6-3, 6-1. Verified.
Adine Masson enters but is unchallenged as champion. Verified.
Adine Masson enters again but is again unchallenged as champion. Verified.
Yvonne (or Hélène) Pr
évost is the only entrant and thus champion without playing a match. Verified.
FI: Mme P. Girod d. Mlle Leroux 6-1, 6-1. Verified.
FI: Adine Masson d. Mme P. Girod 6-0, 6-1. Mme P. Girod, the holder, played through. Verified.
FI: Adine Masson d. Kate Gillou 6-0, 6-8, 6-0. Masson is champion for the fifth and last time. Verified.
Kate Gillou beats Adine Masson in the final match. The finalists are verified, but the score is not clear.
FI: Kate Gillou d. Yvonne de Pfeffel 6-0, 11-9. This might just have been a handicap event. Verified.
Kate Fenwick (née Gillou) d. Virginia MacVeagh (USA). The finalists are verified, but the score is not clear.
FI: Countess Thérèse de Kermel d. Mlle d'Elva 6-1, retired. Not verified.
FI: Kate Fenwick d. A. Péan 6-2, 6-2. Verified.
FI: Jeanne Matthey d. Mme Gallay 10-8, 6-4. Verified.
Jeanne Matthey d. Germaine Régnier 1-6, 6-1, 9-7. Verified.
Jeanne Matthey d. Marguerite Broquedis 6-2, 7-5. Verified.
FI: Jeanne Matthey d. Marie Danet 6-2, 7-5. This is Jeanne Matthey's fourth consecutive and last win in the singles event. Verified.
FI: Marguerite Broquedis d. Jeanne Matthey 6-3, 6-3. Verified.
FI: Marguerite Broquedis d. Suzanne Lengen 5-7, 6-4, 6-3. Verified.