Sub period methods of Valens and Hephastio
Valens and Hephastio treated the 3rd level sub-divisions differently. You will see the results of this listing vary according to which author you choose. Valens was one to tinker with methods to try to get a more accurate result. We have seen this with the method of zodiacal releasing. What is interesting about Valens method is that he treats the 3rd level period as an analog major period and the 4th level division as an analog of the 2nd level. The results of this will only show in the Time Lord List, since the Time Lord Graph only calculates 2 levels.