The stone crossing was not a bridge in the modern sense. It was a row of broad rocks laid through the shallowest part of the Black River, used by farmers when the water was low. Beside it, according to Salum’s notebook, should have stood the first three survey markers.
The first hole was easy to find. Its edges were sharp, the grass newly crushed. The granite marker had been lifted cleanly from the soil.
Kassim photographed the hole from four angles and measured the cut marks. The top layer was dry, but the soil beneath still held the previous night’s moisture.
The stone had been removed less than twelve hours earlier. Halima called two elders who had used the markers after the floods of 1998.
One, Bibi Rahma, could not remember coordinates, but she remembered that at noon the shadow of a mango tree touched the third stone. Kassim checked old satellite images. The tree had stood there long before Kaskazi arrived.
Memory, shadow, and soil began to support one another.
The second marker had not vanished. It had been moved ninety-three metres uphill and reset beside a new concrete peg. That change pushed the customary boundary away from the river and into the red relocation zone. On paper, it made several farms appear to have been established illegally after the dam was built.
Villagers gathered as Kassim worked. Some demanded that he put the stone back immediately. He refused. Moving it again would destroy evidence. Instead he marked the original hole with stakes and string, giving each item an evidence number rather than a family name.
“If we turn this into a fight between households, the company will divide us,” he said. “We record the place, the time, and the witnesses. Ownership comes after preservation.”
Salum watched him in silence. Years earlier he had taught Kassim that a sound map did not favour the loudest claimant. Now his son was applying that principle to Salum’s own testimony.
At the third site, they found tyre tracks leading toward the river and flakes of granite in the mud. Kassim followed them to an abandoned quarry, where a motorcycle had been waiting. The rider fled as soon as they appeared.
Halima caught only the colour of his jacket, but Kassim found a torn strip from a reflective vest stamped with the logo of a Kaskazi subcontractor.
They reported the theft at the local police post. The officer tried to write that “old stones had been misplaced.” Kassim insisted on the words “survey monuments removed after publication of a compulsory relocation map.” He attached photographs and asked the officer to stamp every page. The officer’s hand slowed when he saw Mrema’s name.
Outside, Salum admitted he had hidden copies of the original measurements after the bribery scandal. He said the dam contractor had pressured the survey team to redraw the flood reserve.
He had accepted an envelope when Kassim’s mother needed emergency surgery, then refused to sign the final alteration.
The company leaked a photograph of the envelope and destroyed the record of his refusal.
“You still took it,” Kassim said.
“I did.”
“And you let us believe that was the whole story.”
“I believed silence would keep them away from you.”
“It only left me to inherit the question.”
The confession did not restore trust, but it made the old case more complicated. Kassim recorded it. He would not build a defence by pretending every ugly fact was false.
That afternoon, Halima showed them a WhatsApp message circulating among villagers.
It claimed Kassim was searching for markers so he could seize land for a rival company. The message included a photograph of his vehicle taken that morning.
Someone was following them and shaping the story faster than they could collect evidence.
Kassim created a public evidence log. Each photograph received a timestamp, coordinates, witness names, and a cryptographic fingerprint. Copies went to Halima, the village council, and a lawyer in Dar es Salaam named Upendo Mushi. No crucial file would remain with one person.
Near sunset they located a fourth marker, half buried beneath thorn scrub. Its official number had been chiselled away, but a faint groove remained on the underside. Salum recognized it as part of an older numbering system and began to explain.
A motorcycle roared behind them. A masked rider snatched Salum’s notebook from the bonnet and sped toward the river road.
Kassim ran after him until dust filled his lungs. He could not catch the bike, but he saw the rear tyre leave a distinctive broken-chevron pattern. It matched tracks beside the first empty hole.
The notebook was gone. The evidence log was not.