A retaining wall is needed to stabilise this slope.
First Tom steepens the slope by digging out the extra soil which will go elsewhere.
The first rock is placed.
The second rock is manoeuvred into the right position.
Before long I can see from my studio window the first layer of rocks is place.
Previously Tom had sorted all of the rocks according to the shapes of their surfaces, putting them into his building block categories.
By early evening, there is a new retaining wall in place.
Tom has placed the rocks together as though they were an interlocking puzzle. It looks as though the surfaces have been cut to fit together.