The photo shows a long-haired young woman in a swimsuit, holding her cap, posing with a silver rosebowl trophy. On the back there is a tantalising caption 'With fondest love, Peg. x.' She has then added the vital detail: 100 yards Ladies Championship of Hamilton.
The card appeared to date from before the first World War, so I trawled through the British Newspaper Archive to unearth swimming reports. As Hamilton Public Baths opened in 1909, that narrowed down the timespan.
Further investigation turned up more reports of her around that time, including one in which her name was given as Peggy. Another said she had been at Hamilton Academy.
At last I had her full name, but who was she?
There were a few girls called Margaret Moore living in or near Hamilton around that time, but the clinching detail was that several swimming contests also included a Geraldine Moore, and only one of the candidates had a sister of that name. In fact, the 1912 gala in Hamilton was a double triumph for the Moore family, as Geraldine won the junior championship.
In 1919, Margaret married William MacNeish, an architect, and a few years later they emigrated to the USA. She spent the rest of her life in New York State and died in Woodbury on 14 August 1973, age 78.
Winning that championship was a memorable event in the life of a 17-year-old swimmer, and I am delighted to have finally put a name to the photo that marked her achievement.
* She was not the only 17-year-old Scottish swimmer called Moore to make a splash in 1912. Bella Moore from Govan won a gold medal at the Olympic Games in Stockholm, as part of the British 4x100 metres relay team. As far as I can tell, she was not related to Margaret.