All Hymns are based on old Swedish folk music hymns. The origins for these melodies are very old, going minimum 100 to 150 years back.
Michaelidagen is a well known hymn, that exists in a number of versions. Here, the melody is presented by the cello after a short introduction. Right after, it is played by the organ, and here the cello takes up the triplet figure introduced by the organ in bar 10. A development section follows, the piece ends with a recapitulation of the melody by the cello, in a higher register than before.
The Finale music notation program simulations (that are used for most of the excerpts), are far from perfect. I could have used recordings from an actual performance, but the simulations provide a "neutral" interpretation, and together with the score, they give a fairly relevant picture of the music in question.