This is one of a group of methods that aren't constructed around a single repeated "lead", like most methods, but by a number of rules.
In Dixon's, the basic method is Plain Bob Minor, so 2nds is made when the treble leads, with dodging in 3-4 and 5-6. But something also happens when bells 2 or 4 lead; 4ths is made, with the bells in 5-6 dodging.
Those are the rules, so you must always keep a look out for who is leading. Note that the treble is involved in the method too, either making 4ths or dodging in 5-6, so not every "lead" is the same length. Also watch out for multiple dodges; for instance, at the start of the method, 2 and 4 lead consecutively, meaning the bells in 5-6 do a double dodge. Or, when the 4 makes 2nds over the treble, there must be a triple dodge, made up of a dodge because the 4 leads, then one for the treble lead, then another as the 4 leads again. In fact in the plain course below, it's a quadruple dodge, as it is preceded by the 2 leading! At a single, you could conceivably get a quintuple dodge!
The plain course has 64 changes:
| 1 | 2 | 3 | 4 | 5 | 6 |
| 2 | 1 | 4 | 3 | 6 | 5 |
| 2 | 4 | 1 | 3 | 5 | 6 |
| 4 | 2 | 3 | 1 | 6 | 5 |
| 4 | 3 | 2 | 1 | 5 | 6 |
| 3 | 4 | 1 | 2 | 6 | 5 |
| 3 | 1 | 4 | 6 | 2 | 5 |
| 1 | 3 | 6 | 4 | 5 | 2 |
| 1 | 3 | 4 | 6 | 2 | 5 |
| 3 | 1 | 6 | 4 | 5 | 2 |
| 3 | 6 | 1 | 5 | 4 | 2 |
| 6 | 3 | 5 | 1 | 2 | 4 |
| 6 | 5 | 3 | 2 | 1 | 4 |
| 5 | 6 | 2 | 3 | 4 | 1 |
| 5 | 2 | 6 | 4 | 3 | 1 |
| 2 | 5 | 4 | 6 | 1 | 3 |
| 2 | 4 | 5 | 6 | 3 | 1 |
| 4 | 2 | 6 | 5 | 1 | 3 |
| 4 | 6 | 2 | 5 | 3 | 1 |
| 6 | 4 | 5 | 2 | 1 | 3 |
| 6 | 5 | 4 | 1 | 2 | 3 |
| 5 | 6 | 1 | 4 | 3 | 2 |
| 5 | 1 | 6 | 3 | 4 | 2 |
| 1 | 5 | 3 | 6 | 2 | 4 |
| 1 | 5 | 6 | 3 | 4 | 2 |
| 5 | 1 | 3 | 6 | 2 | 4 |
| 5 | 3 | 1 | 2 | 6 | 4 |
| 3 | 5 | 2 | 1 | 4 | 6 |
| 3 | 2 | 5 | 4 | 1 | 6 |
| 2 | 3 | 4 | 5 | 6 | 1 |
| 2 | 4 | 3 | 5 | 1 | 6 |
| 4 | 2 | 5 | 3 | 6 | 1 |
| 4 | 5 | 2 | 3 | 1 | 6 |
| 5 | 4 | 3 | 2 | 6 | 1 |
| 5 | 3 | 4 | 6 | 2 | 1 |
| 3 | 5 | 6 | 4 | 1 | 2 |
| 3 | 6 | 5 | 1 | 4 | 2 |
| 6 | 3 | 1 | 5 | 2 | 4 |
| 6 | 1 | 3 | 2 | 5 | 4 |
| 1 | 6 | 2 | 3 | 4 | 5 |
| 1 | 6 | 3 | 2 | 5 | 4 |
| 6 | 1 | 2 | 3 | 4 | 5 |
| 6 | 2 | 1 | 4 | 3 | 5 |
| 2 | 6 | 4 | 1 | 5 | 3 |
| 2 | 4 | 6 | 1 | 3 | 5 |
| 4 | 2 | 1 | 6 | 5 | 3 |
| 4 | 1 | 2 | 6 | 3 | 5 |
| 1 | 4 | 6 | 2 | 5 | 3 |
| 1 | 4 | 2 | 6 | 3 | 5 |
| 4 | 1 | 6 | 2 | 5 | 3 |
| 4 | 6 | 1 | 2 | 3 | 5 |
| 6 | 4 | 2 | 1 | 5 | 3 |
| 6 | 2 | 4 | 5 | 1 | 3 |
| 2 | 6 | 5 | 4 | 3 | 1 |
| 2 | 5 | 6 | 4 | 1 | 3 |
| 5 | 2 | 4 | 6 | 3 | 1 |
| 5 | 4 | 2 | 3 | 6 | 1 |
| 4 | 5 | 3 | 2 | 1 | 6 |
| 4 | 3 | 5 | 2 | 6 | 1 |
| 3 | 4 | 2 | 5 | 1 | 6 |
| 3 | 2 | 4 | 1 | 5 | 6 |
| 2 | 3 | 1 | 4 | 6 | 5 |
| 2 | 1 | 3 | 4 | 5 | 6 |
| 1 | 2 | 4 | 3 | 6 | 5 |
| 1 | 2 | 3 | 4 | 5 | 6 |
The calls are the same as in Plain Bob, having effect only when the treble leads. Some extents, and other information, is given on Philip Earis's website - here. This also includes some historical information and comments on the Central Council's view of the method - here.