Harvard Business School historian Nancy Koehn is a regular Open Mic guest on Boston Public Radio. In recent weeks, Koehn intimated to BPR cohosts Jim Braude and Margery Eagan that she's a poet. Koehn promised to read a poem on the show.

On Tuesday, Koehn made good on her promise. The poem she read is called "Nancy and Iris." Here, with Koehn's permission, is the poem in its entirety. Click the audio to hear Koehn read.

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"Nancy and Iris"

By Nancy F. Koehn

They live in the shadows now,

Placeholders for the past.

Terrible it was for each

Of their sons. The leave-taking

So sudden, unthinkable

Even as it happened.

Nancy's boy ran wild in the woods,

Feeding on squirrels and

Indiana acorns.

Savage-like, he and his sister

Waited for Tom to come back

With his gun and his new bride.

Before his father left,

They had made the box. The boy

Carving the pegs for the corners

While Tom hewed the long slats.

Then it was time; she vanished below.

The grave windswept, unresisting,

As the panther's scream filled the night

And the nine-year-old boy with fear.

Across an ocean and the years

That piled on toward our time,

The son of Iris bounced off

The walls in the Dublin house.

Skirting round the black hole of grief

And the blood at the churchyard gate.

The hole grew wide and then deep;

The weeks became months and then years.

His father would not speak of the

Collapse that became an ending.

It had come so quickly:

A brain bleed at her father's

Funeral. Four days on life support;

Her sons called in to say goodbye,

As Sarah and Abe had stood by

Nancy's bedside in an older time.

Iris lay immobile while her children

Crept in, their faces drawn. A switch

Was pulled. He felt the house come

Crashing down. Cut adrift in

Space and time, he staggered farther

Along into his 14th year.

From the shadows, each woman

Looked on as her son tried to

Walk on. At time, each stumbled

Into blackness: dark and deep and

Unrelenting. They both ran from

The emptiness: Abe into books,

Ideas, a way out from Tom's life.

Paul — later Bono — into music,

While his father said: don't dream.

The boys became men. Still they ran.

Recognition, a public stage

Pulling them on; the spectre of

Redemption behind the milestones.

For Nancy's son: a court case won,

The next election, an audition

At Cooper Union: right makes might,

Daring to do our duty.

The scene was then transported.

And the war came. Sumter,

Shiloh, Antietam, Gettysburg.

Fiery trial. From deep within,

A wellspring of compassion and

Vision. From these honored dead,

He found increased devotion,

To save the Union and remake it,

Transmuting the base metal

Of his grief, our grief, into

Terrible, almighty gold.

A new birth of freedom, mined

At fearsome cost, then and now.

The son of Iris took up

His pick axe. He had found platinum

After chasing record contracts, fans,

Top-of-the-charts. Now he wanted more:

A bigger stage, a broader quest,

He dug for justice: debt relief,

Medicine, music and politics.

Where you live should not decide,

Whether you live or whether

You die. Ireland and Africa.

Iris inside of him, and now,

In others around the world.

Nancy and Iris. Do they know

These two women, ripped so early

From their sons, what their boys did

With all the love? What they still do

From the black hole, the shock and awe,

That was their mothers' leaving?

"Nancy and Iris," copyright 2014 Nancy F. Koehn, reprinted here with permission.