When we bought this new house in 2008 there was nothing in the garden, just scrubby turf the builder had put down. The eastern boundary was this low earth bank, 7 feet lower down on the outside is a rarely used public footpath leading down to the coast.
Hacked out the inner face of the bank by hand. I'd already erected the woven wire stock fence & posts.
I'd scrounged rocks which had been removed from local farmers fields.
Random placing of stones, held together with dry-ish mix of sand & cement.
Planted small Hawthorn bushes and built the gate from wood from a pallet.
2 years later, hedge has grown and flowers in the soil behind the wall.