Their sea journey from Boston to St. Petersburg was rudely interrupted by both the Danish and the British who were disputing merchant issues.
Louisa, heart-broken over her sons left in Boston,and ill, suffered also during their transit of the Kattegat Sea, a dangerous marine step to the Baltic Sea, and then St. Petersburg. The weather was difficult and the Kattegat which means cat's hole, lived up to its treacherous reputation. Since at least medieval times this body of water between Norway and Denmark has been called Kattegat because the reefs and shallow sea was so treacherous they thought even a cat would be unable to thread its way through the narrow hazards.
They succeeded in reaching St. Petersburg on October 22, 1809, before the Russian winter had frozen all sea access. It is possible that Louisa and John Adams' arrival was not as dreadful as sailing through the Kattegat, but it was not propitious. Their ship, the Horace, had drifted away one night while they stayed ashore, drifted off miles, with all their trunks, and so they literally arrived at the Russian court with just the worn sets of clothing on their backs.
Her life would continue adventurous, and Louisa would one day be first lady of the United States (1825-1829) and then, her husband still concerned to serve the public good, she was wife of a representative from Massachusetts to the Congress of that country.