An interesting picture.
Dating from the first decade of the 20th century and ostensibly a fashion plate from a magazine.
It should be quite apparent to any Parasol Duelist that this is in fact an illustration of the latest fashion for Duelists. While uncommon by this time there must have been some schools still operating.
Note that the figures are slightly different but would still be recognizable to a duelist from Victoria's time.
The "reverse plant" shown by the lady on the left is a figure not documented under Her Majesty's rules and may have been a local variation. That or a permitted flirtation move perhaps given the gentleman beside her.
Also the twirl has degraded somewhat as it is allowed to rest on the shoulder.
The previously wide interest and popularity of Parasol Duelling is evident in these late illustrations. When one goes looking for them they seem to be everywhere!
Keep your sightglass full, your firebox trimmed and your water iced.