The ascendant, Sun and Moon are used to calculate the Lot of Fortune. Thus using this formula we can begin to understand how a ternary or threefold relationship is formed.
In this lecture, Gregory demonstrates another way of casting solar returns. This method was touched on some years back by Robert Hand, but drifted off the radar. It first appears in Vettius Valens work, "The Anthology." This work was translated and edited by Robert Hand and Robert H. Schmidt.
Since 1998 Greg been using this method in his mundane forecasting and natal work and has gone on to develop this method further. He finds it to be an excellent tool for understanding the year ahead.