This looks like two series of notes in change ringing from a peal of bells. In such change ringing such a series is rung twice and is then followed by a different series. Going through all the permutations of an eight bell peal can take hours - sometimes, depending on the number of bells in the peal, days. It requires great skill and teamwork as each bell is rung by a different person. There are relatively few peals of bells in the US, but in Britain they are quite common. Our Forum member Steve Collins is an authority on bells and English change ringing.

The first pattern (12345678) is called “Rounds”, and the second (13572468) is called “Queens” in English call-change ringing.

1 is the highest pitch not the lowest, because bells always start ringing with the smallest/lightest/highest bell, the treble, and move down to the largest/heaviest/lowest, the tenor. 12345678.

A little by way of background. Your example begins on middle c. It would not do so with actual bells: they would begin rounds with the highest bell, the treble as it’s called, and move down the octave to the lowest, called the tenor. Bells are tuned in a major scale, but there are not always 8 of them (6, 10 or even 12 sometimes, and it also depends how many ringers you have. There are two ways of changing what order the bells are ringing. One is call-changes, where the leader/captain/caller will say, eg “two over three”, so 2 and 3 swap over (3 must ring more quickly for a moment, 2 must hold back to let 3 in, everyone else stays at the same pace), and the new pattern is 132456… you can only do one of those at a time. Here the tenor almost always rings last. The other is method ringing where, briefly, there is pattern which the changes must follow, starting and ending with rounds, and working through a prescribed number of moves. All the bells follow the same pattern but they start at different points on the journey. It can take hours, and in many methods the tenor behaves like any other bell, rather than keeping stroke at the end of the line.

Although bells are tuned according to pitch and scale (a ring of 8 in d-flat, for instance) this is irrelevant to either call-change or method ringing, where it’s the pattern that matters. I lived near a church with an automatic carillon (it worked much like a pianola) which played a variety of tunes, one per day four times a day, provided you didn’t mind that all the notes it could play had to be from a diatonic scale. Not all the tunes it attempted were in fact so composed.

I started a search on bell peal scores and ironically this is the first thing that turned up… and it starts with the low C to boot which is exactly the way I put it in my sample above. This is from handbell musicians.

https://handbellmusicians.org/resources/bell-trees/bell_tree_peal.pdf

I also learned this decades ago in my youth. Have used it extensively through my church music career, whenever, and wherever bells of any sort have been available.