The oldest festivals of the City were not held in spring.
They were held when the leaves began to fall.
Visitors found this strange.
"Surely," they asked, "the season of blossoms deserves celebration."
The Gardeners would smile.
"Without blossoms," they replied, "the Tree would not grow."
"Without autumn, neither would the roots."
So, each year, the people gathered beneath the great Tree whose branches sheltered the Valley, the Palace, the Cathedral, and the City alike.
They did not come to mourn.
They came to watch.
The leaves drifted down in colours no painter could preserve.
Some had shimmered brilliantly all summer.
Others had scarcely been noticed.
A few had once seemed destined to crown the highest branches.
Now they all descended together.
The youngest apprentices rushed forward.
"We must save them!"
"They are too beautiful to lose."
The oldest Gardener gently restrained them.
"Look beneath your feet."
The children looked.
There, beneath centuries of fallen leaves, lay the richest earth in all the Valley.
Nothing grew so well elsewhere.
The Gardener picked up a crumbling leaf whose veins had almost vanished.
"Do you know this one?"
The apprentices shook their heads.
"It once taught the Tree how to reach sunlight."
He picked up another.
"This one discovered how roots could cross stone."
A third had become almost indistinguishable from the soil itself.
"And this one failed completely."
The children frowned.
"Then why is it here?"
"Because the roots cannot tell the difference between wisdom and disappointment once both have become earth."
The apprentices pondered this for a long time.
That evening they followed the Gardeners into the oldest groves where the soil lay deepest.
There the roots passed through layer upon layer of forgotten seasons.
No leaf remained intact.
Yet every root carried something of all that had fallen before.
One spring an unusual branch began producing leaves unlike any the Tree had ever known.
They caught the light in astonishing ways.
Many believed these would remain forever.
The Gardeners admired them greatly.
But they planted no monuments beneath the branch.
Instead they quietly widened the compost beds below.
An apprentice protested.
"Surely these leaves will never fall."
The Gardener asked only one question.
"Would you wish them never to feed the roots?"
The apprentice looked upward.
For the first time she realised that a leaf preserved forever upon its branch would nourish nothing.
Its beauty would become its sterility.
Years later storms stripped whole boughs bare.
Visitors lamented the loss.
The Gardeners did not.
They merely spread the fallen leaves across the forest floor.
By the following spring the roots had reached places they had never before been able to enter.
New branches appeared where no one had expected them.
The Tree had not survived by refusing to lose its leaves.
It had survived because every loss became nourishment.
Even the branches that had withered left curious shapes within the wood.
Future shoots bent around them.
Some found unexpected paths toward the light.
Others inherited strengths no one had intended to give them.
The Tree forgot nothing.
Yet it clung to nothing.
This was its oldest wisdom.
One autumn, when the wind was particularly gentle, the eldest Gardener gathered the apprentices beneath the canopy.
He held up a single golden leaf.
"What becomes of this?"
"It falls," said one.
"It dies," said another.
"It feeds the roots," said a third.
The Gardener smiled.
"All true."
Then he turned the leaf over.
Its veins formed a pattern remarkably like the branches above them.
"Look carefully."
The children stared.
At last one whispered,
"The Tree is remembering itself."
The Gardener nodded.
"Not by keeping every leaf."
"But by allowing every leaf to become part of something larger than itself."
From that day onward the Festival of Falling Leaves was regarded as the holiest season in the Valley.
Not because it celebrated endings.
But because it reminded every Keeper, Builder, Explorer, and Gardener that the Tree had learned its greatest wisdom from relinquishment.
The strength of the Tree did not lie in preserving every leaf it had ever grown.
It lay in knowing that nothing which had honestly nourished its life was ever truly lost.
For every fallen leaf entered the silent work beneath the earth, where forgotten seasons patiently prepared possibilities that no living branch could yet imagine.