Saint Amant wrote many books about subjects other than chess. He also joined the French National Guard. He had reached the rank of Captain by 1848. He was on duty at the Palais des Tuileries during the February Revolution when the palace was stormed by a mob. The chess master turned Captain displayed remarkable powers of persuasion. He actually managed to talk the mob down. Instead of damaging or destroying the palace and killing everyone within, they decided to appoint him as Governor of the Palace.
Two years later he was appointed as French Consul to California. California had just joined the Union and France wanted to build relationships with the new state. He didn't travel until the following year, first attending the London Chess Tournament of 1851. This was the earliest of it's kind comprising of the world's top 16 players.
They would play each other in a league system with the winner at the end being the player with the most points. This new format would become the norm, replacing the old matchplay between two masters. Saint Amant attended only as a spectator, he did not compete. Years later in 1872, while in retirement in Algiers, he was thrown from his carriage and died from his injuries.