The first modern Olympic Games took place in 1896 in its ancient birthplace, Athens, Greece. Sailing was planned for the programme but owing to bad weather the events were not staged.
Fast forward four years to 1900 and sailing's 112 year Olympic history began on the River Seine. Meulan, 20km away from Paris, and Le Havre, located at the mouth of the Seine welcomed the sailors to the Games of the II Olympiad.
All competitors were required to participate in a Concourse d'Honneur on 20 May at Meuan but only seven finished inside the time limit. Two, Mamie and Carabinier were disqualified for "using other means of propulsion than sail."
The image below (taken from the 1900 Olympic Report) shows the boats that finished the Concourse d'Honneur.

The classes were determined under the Thames Tonnage Rules with the 10-20 and Over 20 Ton classes competing on the coast. In fact the big boats just had one race to determine their medal while the smaller classes on the Seine at Meulan had two separate races with medal winners in each.
This is one reason for the inconsistent results because some sources have aggregated the two races in the modern style as an overall series score.
Keeping It In The Family
Count Hermann de Pourtales of Switzerland, winner in the 1-2 Ton class, was the
oldest sailor at 53. Sailing alongside him was his wife, Helene de Pourtales who, at 33, was the oldest woman in any of the 1900 Olympic sports. Helene became the first female Olympic medallist when Lerina (pictured right) crossed the line in a corrected time of 2 hours, 15 minutes and 32 seconds in Race 1 of the 1-2 Ton Class.
The wife and husband sailing duo were also joined by their nephew Bernard and they added a silver medal to their collection in Race 2 after they finished behind the German boat Aschenbradel.
They said
"In common with other sports at the 1900 Games the yachting results are varied, incomplete and contradictory," concluded Ian Buchanan, president of the International Association of Olympic Historians who, with Swede Tore Widlund, ploughed through contemporary accounts in French, German and British periodicals.
"The picture that was in front is really impressive, the many amateur photographers who furnish the bank hasten to take pictures and while the public is in love with this panorama that we will not see for long in Meulan," 1900 Olympic Report