Source A: The line on the wall

An original non-fiction-style practice text, written for this question.

The memorial was a brass plaque fixed to the wall above the river steps. I had passed it for years without reading it. The lettering was small, the metal gone green at the edges, and the names beneath the date looked to me like the sort of thing a town put up and then forgot. When the archive asked for volunteers to help record the flood, I expected boxes of damp papers and a list of names to check against the plaque.

On the first morning, Mr Vale was waiting by the steps with a tin of white paint. He had lived in the town all his life. Without asking, he pointed to a pale line on the brickwork, a few inches above the plaque.

“Water came to here,” he said.

The line was uneven, almost lost in the old mortar. I had thought the plaque was the record. Mr Vale treated the wall as if it had kept a second account.

We worked through the archive boxes in the library. Some papers were blurred where the ink had run; others were lists of addresses, with names crossed through and written again in different hands. I had come expecting a clean sequence: the river rose, people left, the town remembered. Instead, the records left gaps. One address appeared on three lists. Another vanished after a single page. Mr Vale read each name slowly, but he did not explain what he remembered.

At midday, he set the paint tin beside the steps. We used a narrow brush to follow the old waterline. The fresh white looked too bright against the bricks. I asked whether it should be straighter. He looked at the wall, then at the wavering mark under our brush.

“Water doesn’t draw with a ruler,” he said.

I laughed, though he did not. The line dipped around a missing brick and rose again where the mortar had been repaired. It seemed less like a measurement than a hand trying to keep hold of something that would not stay still.

Later, I read the plaque properly. Its formal wording gave the flood a date and the dead a place in the town's story. It did not mention the lists, or the repaired wall, or the people who had returned to the river steps with paint. For a moment, the plaque's neatness seemed like another kind of forgetting. Then a child stopped beside us and asked why the white line went crooked. Mr Vale showed her the broken brick. She traced the dip in the air with one finger, careful not to touch the wet paint.

By the time we packed away, the line was still uneven. I could have corrected it. I had the brush in my hand and enough paint left. Instead, I wiped the bristles clean and set it back in the tin. The plaque caught the late light above us, polished now where someone had rubbed it with a sleeve. I read the names again, not as a complete account, but as the part the town had chosen to keep in metal. The wall beside it held the rest, imperfectly.

How does the writer use language and structure to present the narrator's changing response to the flood memorial?

Support your answer with detailed examples from the text, including brief quotations.