Quarter Peal – 1250 Yorkshire Surprise Major, from an affected bell

At a bob three bells are affected. At our first bob here it is bells 2, 3 and 4. The 3 runs in, the 2 runs out and the 4 makes the bob. After the bob the order of these bells is 2, 4, 3.

A B C 2 4 3 Out In Make

This generalises to any bob at any position. Just label the bells A, B, C and their work at the bob is Out, In, Make respectively.

For a single the first affected bell in the resulting coursing order is the one which has made 3rds and the other affected bell is the one which has made 4ths. For example at the last call here the 5 makes 3rds and the 3 makes 4ths.

Now we can read off the work of any bell...
Just look at the coursing orders now and see if any of the bells have a regular pattern. I like the look of the 5. It is unaffected by the first two calls (Homes) so these calls come when you are about to become 5ths place bell again. For the next 4 bobs its work is Make, In, Make, In. Finally for the single the 5 itself makes thirds.