{"nrhp_refnum":"73001613","name":"Wetherby-Hampton-Snyder-Wilson-Erdman Log House","other_names":["Cockleburr","Prologue House","Cabindale"],"category":"building","location":{"address":"251 Irish Rd.","address_restricted":false,"city":"Tredyffrin","county":"Chester County","state":"PA","lat":40.050138178000054,"lon":-75.45661604399999,"geom_source":"nps_gis"},"listed_date":"1973-04-02","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A log house in Tredyffrin, Chester County, Pennsylvania, built in the early part of the 18th century, with a ground floor of local shale and a log second story. A stone wing was added between 1815 and 1837 and a twentieth-century addition stands at the rear.","why_significant":"The nomination argues the house is significant in architecture as a good example of a style different from the common log house. It is said to show rare use of round logs, a scarce pattern of logs on the second story over a non-log ground level, and both Swedish and North German building traits. It is also presented as a rare case where a log house was enlarged with a stone structure rather than being razed.","narrative":"Built in the early eighteenth century in Tredyffrin Township, Chester County, Pennsylvania, this house has a ground story of local shale, plastered over, with a full-round log second story joined by saddle notches. The chinks between the logs were laid in lime mortar with thin stones set in a herringbone pattern, a feature the nomination links to North German building practice. A large fireplace and chimney reflect Swedish traditions. Whitehead Wetherby was the earliest owner, selling the house and land in 1772. A stone wing with its own fireplace and kitchen was added between 1815 and 1837, and a twentieth-century addition stands at the rear. The house is valued for its unusual construction: its round logs, its mixed materials, and its design blending Swedish and North German features. It is also notable because the owners extended the original house instead of demolishing the log structure to build a new stone house, which was the more common practice.","period_of_significance":"18th Century","architect_builder":null,"architectural_style":"Swedish and North German elements (fireplace and chimney; vertical siding and herringbone chinking)","criteria":["C"],"status_note":"Condition marked good; original site; altered.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:29.891941-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/73001613.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/73001613/9a2ca76273-800.webp","url_1600":"https://nationalhistoricalregister.com/media/73001613/9a2ca76273-1600.webp","licence":"CC0","author":"Smallbones","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Log_House_B.JPG\" rel=\"noopener\">Smallbones</a>, <a href=\"http://creativecommons.org/publicdomain/zero/1.0/deed.en\" rel=\"license noopener\">CC0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Log_House_B.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71998376","wikipedia":"https://en.wikipedia.org/wiki/Wetherby%E2%80%93Hampton%E2%80%93Snyder%E2%80%93Wilson%E2%80%93Erdman_Log_House","wikidata":"https://www.wikidata.org/wiki/Q7990076"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/chester-county/wetherby-hampton-snyder-wilson-erdman-log-house-73001613/"}