Three embroidered sweetheart postcards, c early 20th century. From France?
One "To My Dear Sister", with very faint illegible writing to the reverse.
One dated "1914 - 1915",  with very faint illegible writing to the reverse.
On with a sheer embroidered pocket containing a card "Souvenir de Glorieuse Memoire 1914 - 1915" and "Many Happy Returns"

Colours still fresh.
Foxing and wear commensurate with age.
Some hard glue residue on the edges, suggesting that they may have stuck into an album?
See photos.

Approximate dimensions: W 14 cm, H 9 cm.