{"title": "Drawing the Line", "subjects": ["Mason, charles, 1730-1787", "Dixon, jeremiah", "Frontier and pioneer life", "Surveying", "Pennsylvania, boundaries", "Maryland, history", "History", "Boundaries"], "key": "/works/OL21585618W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL6517560A"}}], "type": {"key": "/type/work"}, "covers": [13267096], "latest_revision": 3, "revision": 3, "created": {"type": "/type/datetime", "value": "2020-08-24T10:38:49.060358"}, "last_modified": {"type": "/type/datetime", "value": "2026-01-18T01:24:29.775479"}}