"My father laid this."
His voice sounded strange.
Toby had never thought of Walter as somebody's child.
Yet here was something Walter's father had touched with his hands.
They opened another section.
Collapsed.
Stones had crushed it.
Years of tractors compressed the soil.
Ray said, "There's your problem."
Helen asked, "Can you fix it?"
"Maybe."
He cleared roots.
Sediment.
Broken clay.
They worked until sunset.
No flow.
The next morning, the damp line below the dam had widened.
Helen stared at it.
"We're running out of time."
Ray nodded.
They opened another section.
Then another.
At midday, Ray found a bend completely packed with hard mineral sediment.
He used hand tools instead of machinery.
Slow.
Careful.
Toby watched.
Walter watched.
Helen brought sandwiches nobody ate.
Ray chipped.
Scraped.
Cleared.
Then the blockage broke.
Mud coughed from the pipe.
A brown trickle appeared.
Toby leaned forward.
"Water."
Ray held up one hand.
"Wait."
The trickle grew.
Thin stream.
Then steady.
Cold spring water flowed through clay laid decades before Toby was born.
It ran downhill.
Into the old drainage swale.
Toward the lower pasture.
Walter sat on the excavator track.
He laughed.
Not loudly.
Relief.
Pure relief.
Toby ran toward the pond.
He checked his marker.
Still rising.
That worried him.
But by evening:
No change.
The next morning:
Same.
The pond had stopped.
The damp patches below the dam began drying.
The dangerous seepage disappeared.
The old system worked again.
Not perfectly.
Ray replaced collapsed pipe with modern drainage tubing where necessary.
He built an access box around the old control chamber.
He added a safe overflow.
But the logic remained exactly what the old ledger had shown.
Spring enters collection chamber.
Controlled flow to pond.
Excess diverted downhill.
Walter stood beside the restored outlet.
"All these years."
Toby looked at him.
"What?"
"We thought the pond was the system."
Walter shook his head.
"The pond was only one piece."
The drought did not end.
Not immediately.
September remained dry.
October finally brought rain.
But the Mercer farm survived the worst stretch.
They did not sell fifteen cattle.
They sold only five older cows already planned for culling.
The spring maintained the pond.
The lower diversion kept it safe.
The narrow strip along the outlet stayed greener than surrounding pasture.
Not enough to feed the herd.
Enough to matter.
Helen began keeping different records.
Not just cattle.
Water.
Toby's notebook became official farm paperwork.
She copied his measurements into a new binder.
Walter dictated memories.
Toby wrote them down.
Springhouse approximately north hollow.
Used for milk cooling before pond.
Collection chamber stone.
Iron gate controlled by tarred rope.
Lower diversion must remain open.
Inspect after storms.
Never bury without marking.
Ray drew accurate measurements.
Distances from fence corners.
Depth.
Pipe route.
Outlet location.
Helen made three copies.
One stayed in the farmhouse.
One went into a metal box in the barn office.
One went to the county extension office.
Toby asked why three.
Helen said:
"Because people forget."
Walter looked toward the pond.
"Land doesn't."