Elkridge Furnace

The Elkridge Furnace ran on fire and forced labor. Caleb Dorsey established it in the mid-1700s on the Patapsco — forests for charcoal, ore deposits in the hills, the river running to the Chesapeake — and made it one of colonial Maryland's largest iron producers. The men who fed the furnace were enslaved, indentured, and convict laborers working in heat that never relented. They ran — the runaway ads are the archive's documents: Samuel Dorsey's $48 reward in 1775 for an enslaved man and an indentured servant who fled together; Nicholas Dorsey's $60 in 1784 for Toby, whose filed teeth told researchers where in Africa he'd been taken from.

The furnace peaked during the Revolution, when embargoes made Maryland iron precious, and was rebuilt after the War of 1812 under the Ellicotts — the mill family that bought it in 1822 and enlarged it to produce 16,000 tons of pig iron. The six surviving buildings tell the hierarchy: the owner's refined Federal-Greek Revival house, the company store and workers' dormitory with its early security devices, and two small plank cabins — the buildings archaeologists identified as the quarters where enslaved furnace workers lived in the 1850s.

The Patapsco ended it — flooding and fire destroyed the operation in 1873 and it was never rebuilt. The complex is on the National Register and the Network to Freedom: the fugitives from Elkridge weren't passengers on the Railroad, they were workers who ran from industrial slavery itself, and the runaway ads the owners published are the documentation of their resistance.

Elkridge Furnace is the archive's industrial-slavery file — the iron furnace where enslaved and indentured and convict labor made the Revolution's iron, where the runaway ads document the men who fled, and where the workers' cabins still stand beside the owner's mansion.