{"nrhp_refnum":"06000157","name":"Cock-Cornelius House","other_names":["Wyckoff-Underhill House"],"category":"building","location":{"address":"34 Birch Hill Rd.","address_restricted":false,"city":"Locust Valley","county":"Nassau County","state":"NY","lat":40.87415668300008,"lon":-73.58776098399994,"geom_source":"nps_gis"},"listed_date":"2006-03-22","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Exploration/Settlement","Social History","Education","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A U-shaped, wood-shingled, wood-frame house at 34 Birch Hill Road in Locust Valley, Town of Oyster Bay, Nassau County, New York, built in sections from about 1768 or earlier through the 1920s-30s. It is also known as the Wyckoff-Underhill House.","why_significant":"It is significant under Criterion A for its ties to the Cock family, early settlers of Oyster Bay, and to the Cornelius family, regional educators who ran a private boarding school there. Under Criterion C it is an intact example of residential design evolving from the mid-eighteenth to early twentieth century, with Federal, Greek Revival and Colonial Revival elements.","narrative":"This U-shaped wood-frame house on Birch Hill Road in Locust Valley grew in stages over roughly 250 years. The oldest part, the north section of the west wing, may date to 1768 or earlier and likely matches the \"new west house\" in Hezekiah Cock's will. The main block dates to about 1790 in its first section, with a half story and two more bays added in the 1840s when Lot Cornelius turned the house into the Walnut Grove Seminary, a private boarding school that later served girls and closed in 1869. In 1924 Jane Teller Robinson and her husband bought the property, added the east wing, applied Colonial Revival paneling, and ran it as the Stage Coach Inn restaurant. In 1928 the house hosted the vote to form the Incorporated Village of Matinecock. It remains on its original site with Federal and Greek Revival details, and a later garage is noncontributing.","period_of_significance":"Circa 1768-1936","architect_builder":"unknown","architectural_style":"Federal","criteria":["A","C"],"status_note":"Historic functions were residence, school and restaurant; the form lists current functions as residence, store and restaurant.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:51:52.844038-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/06000157.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75319079","wikipedia":"https://en.wikipedia.org/wiki/Cock-Cornelius_House","wikidata":"https://www.wikidata.org/wiki/Q5139491"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/nassau-county/cock-cornelius-house-06000157/"}