{"nrhp_refnum":"73001609","name":"Derbydown Homestead","other_names":["Abraham Marshall House","Birthplace of Humphry Marshall","See Al"],"category":"building","location":{"address":"At jct. of CR 15077 and 15080","address_restricted":false,"city":"Northbrook","county":"Chester County","state":"PA","lat":39.92538918300005,"lon":-75.68645191699994,"geom_source":"nps_gis"},"listed_date":"1973-04-02","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Agriculture","Science"],"significance_levels":["local"],"summary":{"what_it_is":"Derbydown is a farmhouse in Northbrook, Chester County, Pennsylvania, originally built as a small one-room-deep structure and later enlarged. It is listed as a building on its original site.","why_significant":"The nomination argues the house is significant for its association with Humphry Marshall, an early American botanist and man of science who was born there and enlarged it in 1764. It also cites the Marshall family's role in establishing the Bradford Friends Meeting and Marshall's civic work in Chester County.","narrative":"A farmhouse near Northbrook in Chester County, Pennsylvania, Derbydown was built in or shortly after 1707 by Abraham Marshall and his wife Mary Hunt, who moved there from Darby. It began as a one-room-deep, three-bay structure and was later raised to a story and a half with a gambrel roof. In 1764 their son Humphry Marshall added a room in depth and raised the roof to a gable form, building the work himself with brick and fieldstone walls; he had been apprenticed to a stone mason. Humphry Marshall was born in the house in 1722 and became one of America's first botanists. He kept a botanical garden and arboretum, wrote an early botanical work on American trees and shrubs published in 1785, and traded in seeds and plants. He also held administrative posts in Chester County and helped found the county almshouse and Westtown Boarding School.","period_of_significance":"1707-1801","architect_builder":"Humphry Marshall (enlargement of 1764; he did the work himself)","architectural_style":null,"criteria":[],"status_note":"Altered; Original Site; condition marked good; the document notes further damage since 1915.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:29.763419-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/73001609.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/73001609/2fbb89ef05-800.webp","url_1600":"https://nationalhistoricalregister.com/media/73001609/2fbb89ef05-1600.webp","licence":"CC0","author":"Smallbones","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Derbydown_Barn.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:Derbydown_Barn.JPG"},"district":{"nrhp_refnum":"85002374","name":"Northbrook Historic District","url":"https://nationalhistoricalregister.com/districts/pennsylvania/northbrook-historic-district-85002374/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71992532","wikipedia":"https://en.wikipedia.org/wiki/Derbydown_Homestead","wikidata":"https://www.wikidata.org/wiki/Q15213696"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/chester-county/derbydown-homestead-73001609/"}