A place for every stone

Both texts are newly written practice sources about invented people, places or projects.

Text One: An original diary account by a volunteer helping to rebuild an invented boundary wall.

On my first morning, I sorted the stones into broad groups according to size. I assumed that this had decided where each one would go. The instructor explained that the piles were only a starting point because a stone that looked suitable from above might rock when its weight rested on a different face.

I chose a broad stone with a smooth front and lowered it into the wall. It moved when I pressed one corner. My next choice looked less regular, but after I turned it twice, one side settled firmly between its neighbours. I began to examine the hidden surfaces instead of choosing stones for the face that would remain visible.

A poor choice also affected the next layer. I once spent several minutes searching for a stone to fill an awkward space before realising that the problem had been created by the stone below it. Removing that lower stone felt like losing work, but its replacement gave us several possible positions above.

By the afternoon, I was placing fewer stones each hour, but I was also rebuilding fewer sections. Testing a choice slowly proved quicker than completing a long stretch that would have to be taken apart.

Text Two: An original report about a different volunteer wall-building project.

The route and height of the new wall had been marked, but there was no plan assigning a position to every stone. The material was too irregular for that. Builders arranged the stones in rough size groups and made more detailed decisions as the wall developed.

At the base, an experienced builder selected a broad stone, rotated it and pressed each corner before accepting it. She rejected the next stone because it shifted under her hand, although its front edge followed the marked line perfectly. A smaller stone fitted securely after being turned so that its narrowest face could no longer be seen.

The builder checked more than the stone she had just placed. She looked along the developing face and considered the spaces left for the next row. When one section began to push beyond the line, she removed several stones and changed the lower arrangement. The corrected section offered a flatter surface for the work above.

Visitors sometimes interpreted these pauses as uncertainty. In fact, each pause prevented an unsuitable position from becoming buried inside the finished wall. The builders were not following a complete pattern, but neither were they placing stones at random. The boundary markers, repeated pressure checks and effect on neighbouring stones all guided their choices.

Synthesise what you learn from both texts about choosing and placing stones in the wall.