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Sins Of The Earth: Part Two - The Ironmasters

11 de novembro de 2026 · 25 min

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SINS OF THE EARTH

Part Two: The Ironmasters

The Devil Within — Hosted by Branden Morgan

Before northern New Jersey became a landscape of suburban neighborhoods, lakeside communities, and winding mountain roads, it was the birthplace of an industrial empire. And the men who built it were willing to sacrifice an extraordinary amount to extract the wealth buried beneath their feet.

In the second installment of Sins of the Earth, we return to the eighteenth-century New Jersey Highlands, where vast deposits of iron ore attracted a new breed of entrepreneur: the ironmasters.

Among them was Peter Hasenclever, a German-born industrialist whose extraordinary ambitions helped transform the forests and mountains of northern New Jersey into a sprawling network of mines, furnaces, forges, and industrial settlements. Backed by the American Iron Company, Hasenclever envisioned an enterprise capable of supplying the growing British colonies with one of civilization's most indispensable materials.

But turning stone into iron required considerably more than ambition.

Entire forests were harvested to produce charcoal. Rivers were dammed to power enormous bellows. Roads were carved through mountains, and generations of workers endured brutal conditions to keep the furnaces burning. At places like Long Pond, the landscape itself became part of an enormous industrial machine.

And with every ton of iron produced came something else: smoke, ash, slag, and the physical consequences of an industry that would eventually disappear, leaving its remnants scattered throughout the Highlands.

What happens when the industry dies, but its legacy remains buried in the land?

As our investigation continues, we examine the extraordinary achievements of colonial ironmaking alongside the environmental questions that would become central to Sins of the Earth. Could the consequences of industrial activity have persisted long after the furnaces went cold? And is there any credible evidence connecting that legacy to the darker chapters of Jefferson Township's modern history?

The answers are far from certain. But the questions are becoming increasingly difficult to ignore.

Because the ironmasters came to the Highlands looking for fortunes.

What they left behind may prove considerably more interesting.

IN THIS EPISODE

• The rise of iron production in colonial America and Britain's Iron Act of 1750.

• Peter Hasenclever, the American Iron Company, and the industrial development of Long Pond.

• The enormous demand for timber, charcoal, waterpower, and human labor.

• Life inside the furnaces, mines, and ironworking communities of the eighteenth-century Highlands.

• The environmental legacy of colonial ironmaking and the unanswered questions surrounding its long-term consequences.

NEXT EPISODE: BENEATH THE MOUNTAINS

We explore the expanding iron industry of northern New Jersey, the establishment of Jefferson Township, and the forgotten mines and industrial ruins still concealed within the forests of Jefferson, Milton, Oak Ridge, and West Milford.


LISTEN. FOLLOW. JOIN THE INVESTIGATION.

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Join the Conversation: Follow @thedevilwithinpod on Instagram for episode updates, behind-the-scenes material, and more from the investigation.

Have a Story or a Tip? Do you have family connections to the iron industry of northern New Jersey, historical documents, photographs, or firsthand knowledge of the region's abandoned mines and furnaces? We'd love to hear from you.

Email: mailto:[email protected]

The Devil Within is an Evio Creative production.

The most enduring things we leave behind are not always the things we intended to build.

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