These trips happened all the way to late 1940s. Here's a good book: https://en.wikipedia.org/wiki/The_Last_Grain_Race https://en.wikipedia.org/wiki/The_Last_Gra

These trips happened all the way to late 1940s. Here's a good book: https://en.wikipedia.org/wiki/The_Last_Grain_Race https://en.wikipedia.org/wiki/The_Last_Grain_Race If you get the chance, the Pommern is a beautifully preserved ship from that era in Mariehamn's excellent maritime museum.