Originally Posted by Jim McDougall
... It is not said what became of D'Anthes, who had inadvertently immortalized Pushkin...
Salaams Jim, The story unwinds a little more as after the duel ~ d'Anthès was imprisoned at Peter and Paul Fortress in St. Petersburg. Dueling was illegal in Russia, and d'Anthès was called to court, but he was pardoned by the Emperor. Stripped of his rank, he was escorted back to the frontier and ordered to leave Russia permanently. In Berlin, he was joined by his wife, and the couple returned to France, in his father's region. There he began a successful political career: as first president of the local assembly, then member of the National Constituent Assembly from 1848 to 1852, and, at last, irremovable senator from 1852 to 1870.
His wife died on 15 October 1843 while giving birth to their fourth child. He died on 2 November 1895 at his family house of Soultz-Haut-Rhin (Sulz/Oberelsaß), then part of the German Empire.
Interesting portrait of d'Anthès below;