{"id":3654,"slug":"marietta-house-glenn-dale-maryland","story":[{"heading":null,"paragraphs":["Marietta is the judge's plantation — Gabriel Duvall's 1813 Federal house, the Supreme Court justice who enslaved forty. The paradox was the lawyer — the 120 freedom suits he won, the Butler petition he fought. The generations were the labor — the Ducketts and Butlers and Jacksons, the tobacco that was the crop.","The office is the remnant — the brick law building beside the house, the root cellar that's the ruin. The museum is the reckoning — the database of the enslaved names, the tour that tells both sides. Marietta is the contradiction — the justice who freed others' slaves and kept his own, the plantation that's the museum now.","The file keeps Marietta: the 1813 house, Duvall's dual role, the enslaved families, and the law office.","Marietta is the archive's Glenn Dale file — the justice's slave plantation."]},{"heading":"Why this file matters","paragraphs":["Marietta is the archive's Glenn Dale file — the Supreme Court enslaver.","A house keeps its paradox — the file's suggestion being that Marietta's hold is the split: the lawyer who won freedom suits, the justice who held forty, and the museum that shows both."]}],"name":"Marietta House","aliases":[],"type":"HISTORIC_SITE","type_label":"Historic Site","cats":["DARK_HISTORY","UNDERGROUND_RAILROAD_HISTORY","AFRICAN_AMERICAN_HISTORY","HISTORIC_ESTATE","UNDERGROUND_RAILROAD"],"groups":["dark-history","historic-sites"],"desc":"The 1812 house—where the judge’s enslaved worked.","full_desc":"Marietta House is a historic site in Glenn Dale, Maryland, an NPS Network to Freedom. The 1812 house—where the judge’s enslaved worked. The archive files it under Underground Railroad history, the Underground Railroad and African American history. The dossier holds 3 documented facts — the record is history-forward, no paranormal claims on file. The site is open to visitors.","address":null,"city":"Glenn Dale","county":null,"state":"Maryland","postal":null,"region":"South","lat":38.984394,"lon":-76.800321,"coord_kind":"CITY","status":"ACTIVE","access":"PUBLIC","access_notes":null,"ownership":null,"website":null,"phone":null,"year_built":null,"year_opened":null,"year_closed":null,"year_demolished":null,"designation":"NPS Network to Freedom","current_use":"Historic site","research_notes":"UGRR enrichment wave 1; VERIFY task auto-queued.","stage":"SOURCE_RESEARCH","quality":{"level":"MEDIUM","score":67.9,"dims":{"location_confidence":0.75,"identity_confidence":0.85,"historical_confidence":0.8,"source_quality":1,"paranormal_claim_provenance":null,"coordinate_confidence":0,"current_access_confidence":0.7,"freshness":0.65}},"claims":[],"history":[{"description":"NPS includes this site in the National Underground Railroad Network to Freedom. Marietta House's past is on record — the entry belongs to the verified layer the museum itself interprets. The fact is historically verified — the part of the file that doesn't need hedging. The detail is preserved in 'Public NPS Network to Freedom listings, row 2, ID 01GA01'. The detail belongs to the verified spine of the entry.","evidence":"HISTORICALLY_VERIFIED","date_start":null,"date_end":null,"confidence":null,"source":{"name":"Public NPS Network to Freedom listings, row 2, ID 01GA01","url":"https://www.nps.gov/common/uploads/sortable_dataset/undergroundrailroad/F0E29766-00A1-12E5-C3D062151C3F7E26/nri-NTFListings6426NOPIItable.csv?t=1784017173223","publisher":"National Park Service","type":"GOVERNMENT","authority":1}},{"description":"Marietta House is documented on the National Park Service Network to Freedom for its role in the Underground Railroad. Marietta House's past is on record — the entry belongs to the verified layer the museum itself interprets. It's verified history: the dossier's load-bearing detail. The record appears in 'NPS Network to Freedom listing'. Documented ground is what separates this file from pure legend — this is part of it.","evidence":"HISTORICALLY_VERIFIED","date_start":null,"date_end":null,"confidence":null,"source":{"name":"NPS Network to Freedom listing","url":"https://www.nps.gov/subjects/ugrr/index.htm","publisher":"National Park Service","type":"GOVERNMENT","authority":1}},{"description":"The 1812 house is documented. The site's documented history is the record the rest of the file stands on. The fact is historically verified — the part of the file that doesn't need hedging. The detail is preserved in 'NPS Network to Freedom listing'. The entry's timeline holds it; the lore holds the rest.","evidence":"HISTORICALLY_VERIFIED","date_start":null,"date_end":null,"confidence":null,"source":{"name":"NPS Network to Freedom listing","url":"https://www.nps.gov/subjects/ugrr/index.htm","publisher":"National Park Service","type":"GOVERNMENT","authority":1}}],"legends":[],"entities":[],"events":[],"investigations":[],"encounters":[],"media":[],"persons":[],"visitor":{"tour_availability":"Verify before visiting","notes":"Historic site; verify hours and access with the managing agency before visiting; check nps.gov for current hours and alerts.","last_verified_at":"2026-09-18 11:32:55","source":{"name":"HauntHunt generic access guidance","url":"https://haunthunt.com/about#access-guidance","publisher":"HauntHunt editorial","type":"DIRECTORY","authority":2}},"sources":[{"name":"Public NPS Network to Freedom listings, row 2, ID 01GA01","url":"https://www.nps.gov/common/uploads/sortable_dataset/undergroundrailroad/F0E29766-00A1-12E5-C3D062151C3F7E26/nri-NTFListings6426NOPIItable.csv?t=1784017173223","publisher":"National Park Service","type":"GOVERNMENT","authority":1},{"name":"NPS Network to Freedom listing","url":"https://www.nps.gov/subjects/ugrr/index.htm","publisher":"National Park Service","type":"GOVERNMENT","authority":1},{"name":"Underground Railroad","url":"https://en.wikipedia.org/wiki/Underground_Railroad","publisher":"Wikipedia","type":"ENCYCLOPEDIA","authority":4}],"conflicts":[],"wiki":null,"counts":{"claims":0,"history":3,"legends":0,"entities":0,"sources":3}}