{
 "slug": "brown-castle-geyser-1891",
 "painting": {
  "artist": "Grafton Tyler Brown",
  "title": "Castle Geyser, Yellowstone",
  "year": 1891,
  "holder": "Eiteljorg Museum",
  "accession": "2017.3.1",
  "image": null,
  "image_reason": "no_documented_open_licence_for_this_reproduction"
 },
 "window": {
  "start": "1890-09-06",
  "end": "1890-09-06",
  "days": 1,
  "basis": "Eiteljorg’s documented on-site sketch date; not a date for the painted sky.",
  "context_start": "1890-09-01",
  "context_end": "1890-09-30"
 },
 "station": {
  "name": "Camp Sheridan, Mammoth Hot Springs, Wyoming",
  "printed_name": "Fort Yellowstone, Yellowstone National Park, Wyo.",
  "archive_id": "NCEI CL-1059 / AE06167 / 00984",
  "lat": null,
  "lon": null,
  "km_to_geyser": null,
  "location_reason": "historical_instrument_coordinates_not_established",
  "caveat": "Mammoth station evidence, not an observation at Castle Geyser in the Upper Geyser Basin."
 },
 "target": {
  "date": "1890-09-06",
  "tmax_f": 45,
  "tmin_f": 28,
  "range_f": 17,
  "locator": "printed p. 14",
  "tmax_c": 7.2,
  "tmin_c": -2.2,
  "lowest_maximum_rank": 1,
  "tied_maxima": 1,
  "comparison_days": 30
 },
 "month": {
  "days": 30,
  "mean_f": 52.58,
  "comparison": "Daily maxima within September 1890 at this station; not an exceptional-year or climate ranking."
 },
 "series": [
  {
   "date": "1890-09-01",
   "tmax_f": 74,
   "tmin_f": 47,
   "range_f": 27,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-02",
   "tmax_f": 69,
   "tmin_f": 37,
   "range_f": 32,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-03",
   "tmax_f": 71,
   "tmin_f": 31,
   "range_f": 40,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-04",
   "tmax_f": 75,
   "tmin_f": 36,
   "range_f": 39,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-05",
   "tmax_f": 70,
   "tmin_f": 42,
   "range_f": 28,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-06",
   "tmax_f": 45,
   "tmin_f": 28,
   "range_f": 17,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-07",
   "tmax_f": 57,
   "tmin_f": 22,
   "range_f": 35,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-08",
   "tmax_f": 68,
   "tmin_f": 35,
   "range_f": 33,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-09",
   "tmax_f": 71,
   "tmin_f": 30,
   "range_f": 41,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-10",
   "tmax_f": 72,
   "tmin_f": 30,
   "range_f": 42,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-11",
   "tmax_f": 65,
   "tmin_f": 31,
   "range_f": 34,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-12",
   "tmax_f": 65,
   "tmin_f": 20,
   "range_f": 45,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-13",
   "tmax_f": 69,
   "tmin_f": 28,
   "range_f": 41,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-14",
   "tmax_f": 70,
   "tmin_f": 43,
   "range_f": 27,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-15",
   "tmax_f": 76,
   "tmin_f": 37,
   "range_f": 39,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-16",
   "tmax_f": 77,
   "tmin_f": 41,
   "range_f": 36,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-17",
   "tmax_f": 79,
   "tmin_f": 41,
   "range_f": 38,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-18",
   "tmax_f": 64,
   "tmin_f": 38,
   "range_f": 26,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-19",
   "tmax_f": 72,
   "tmin_f": 34,
   "range_f": 38,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-20",
   "tmax_f": 71,
   "tmin_f": 36,
   "range_f": 35,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-21",
   "tmax_f": 72,
   "tmin_f": 31,
   "range_f": 41,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-22",
   "tmax_f": 71,
   "tmin_f": 33,
   "range_f": 38,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-23",
   "tmax_f": 75,
   "tmin_f": 34,
   "range_f": 41,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-24",
   "tmax_f": 75,
   "tmin_f": 34,
   "range_f": 41,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-25",
   "tmax_f": 71,
   "tmin_f": 35,
   "range_f": 36,
   "locator": "printed p. 14"
  },
  {
   "date": "1890-09-26",
   "tmax_f": 72,
   "tmin_f": 34,
   "range_f": 38,
   "locator": "printed p. 15"
  },
  {
   "date": "1890-09-27",
   "tmax_f": 76,
   "tmin_f": 36,
   "range_f": 40,
   "locator": "printed p. 15"
  },
  {
   "date": "1890-09-28",
   "tmax_f": 79,
   "tmin_f": 38,
   "range_f": 41,
   "locator": "printed p. 15"
  },
  {
   "date": "1890-09-29",
   "tmax_f": 73,
   "tmin_f": 39,
   "range_f": 34,
   "locator": "printed p. 15"
  },
  {
   "date": "1890-09-30",
   "tmax_f": 64,
   "tmin_f": 46,
   "range_f": 18,
   "locator": "printed p. 15"
  }
 ],
 "quotes": {
  "field": {
   "text": "on-site on September 6, 1890",
   "source": "Eiteljorg Museum, Artist Spotlight",
   "receipt": "making"
  },
  "studio": {
   "text": "at his Helena, Montana, studio",
   "source": "Eiteljorg Museum, Artist Spotlight",
   "receipt": "making"
  },
  "brochure": {
   "text": "careful studies from nature",
   "source": "Brown’s 1886 brochure, quoted in the MFA Boston catalogue, note 1",
   "receipt": "brochure"
  },
  "snow": {
   "text": "Snow; ground covered.",
   "source": "1891 superintendent report, September 6 row, printed p. 14",
   "receipt": "report"
  },
  "geyser": {
   "text": "Its eruption pattern has changed considerably throughout its recorded history.",
   "source": "National Park Service, Castle Geyser",
   "receipt": "castle"
  }
 },
 "witness": {
  "date": "1890-09-06",
  "text": "Snow; ground covered.",
  "locator": "printed p. 14",
  "began": "4.30 p. m.",
  "ended": "5.30 p. m.",
  "timing_note": "Times appear in the printed report; not resolved on the manuscript. No conversion to modern UTC."
 },
 "excluded": {
  "rain_amount": {
   "value": null,
   "reason": "date_alignment_differs_between_manuscript_and_print",
   "detail": "The .17-inch during-night entry sits on the manuscript row for 6 September and the printed row for 5 September. It is not assigned to the sketch day."
  },
  "snow_depth": {
   "value": null,
   "reason": "inappreciable_symbol_not_numeric_zero",
   "detail": "Printed 6 September snow amount and depth carry the asterisk explained as Inappreciable; the remark says ground covered."
  },
  "cloud_cover": {
   "value": null,
   "reason": "not_recorded_in_selected_register"
  },
  "humidity": {
   "value": null,
   "reason": "not_recorded_in_selected_register"
  },
  "wind_speed": {
   "value": null,
   "reason": "not_recorded_in_selected_register"
  },
  "instrument_coordinates": {
   "value": null,
   "reason": "blank_on_manuscript_and_zero_placeholder_in_noaa_index"
  },
  "observation_day_boundary": {
   "value": null,
   "reason": "reset_hour_not_established"
  }
 },
 "unresolved": {
  "painted_weather_date": null,
  "castle_weather": null,
  "eruption_time": null,
  "artistic_weather_change": null,
  "modern_anomaly": null,
  "reason": "no_documented_connection_between_canvas_weather_and_a_local_observation"
 },
 "verdict": "GREEN for a bounded sketch-date context study; weather agreement remains Unknown.",
 "receipts": {
  "museum": {
   "file": "brown-castle-geyser-1891/eiteljorg-object.html",
   "url": "https://collections.eiteljorg.org/objects/9861/castle-geyser-yellowstone",
   "sha256": "cd148482c9d5be23ba45f33268400c1c923360b6ee68cdba65c6c9076e13c2bd",
   "title": "Eiteljorg Museum, Castle Geyser, Yellowstone, 2017.3.1",
   "license": "Museum catalogue; research cache, no open image licence established",
   "retrieved_at": "2026-10-07",
   "locator": "Object details"
  },
  "making": {
   "file": "brown-castle-geyser-1891/eiteljorg-mlk.html",
   "url": "https://eiteljorg.org/martin-luther-king-jr-day/?t=103",
   "sha256": "731f34f192189ebaf498f3ca8bfaa78acbbf7b85cf54d9da31865e4f7075a157",
   "title": "Eiteljorg Museum, Artist Spotlight on Grafton Tyler Brown",
   "license": "Copyright Eiteljorg Museum; brief quotation and factual paraphrase only",
   "retrieved_at": "2026-10-07",
   "locator": "Artist Spotlight; query parameter avoids the bare URL’s access failure"
  },
  "inscription": {
   "file": "brown-castle-geyser-1891/bonhams.html",
   "url": "https://www.bonhams.com/auction/23852/lot/147/grafton-tyler-brown-1841-1918-castle-geyser-yellowstone-29-12-x-19inoverall-33-12-x-23-12-in/",
   "sha256": "f28f8e75671bfbffe4c201e676f62b01c555e8503c38a07b68334b261a142ad3",
   "title": "Bonhams, 11 April 2017, lot 147, Castle Geyser, Yellowstone",
   "license": "Copyright Bonhams catalogue; Brown’s transcribed inscription is public domain",
   "retrieved_at": "2026-10-07",
   "locator": "Research lead: accession match unconfirmed; original reverse not inspected. The accepted date rests on the holder’s account."
  },
  "brochure": {
   "file": "brown-castle-geyser-1891/mfa-geyser.html",
   "url": "https://collections.mfa.org/objects/530885",
   "sha256": "4e1eaaf68832c7546d74896b3b245c55cd8a42758a243ef3e51fcb15983805f1",
   "title": "MFA Boston, A Yellowstone Geyser, 2009.4329",
   "license": "Copyright MFA Boston; Brown’s quoted brochure words are public domain",
   "retrieved_at": "2026-09-30",
   "locator": "Catalogue note and footnote 1; a different painting; source cache reused from T79, retrieved 30 September 2026"
  },
  "register": {
   "file": "brown-castle-geyser-1891/camp-sheridan-1890-09.jpg",
   "url": "https://www.ncei.noaa.gov/nerms/api/document/69AEAFAE95E349CC8832AD6AC183377B/download",
   "sha256": "63e0e65a791ba9a6d39bd04e6de1ed1cf60d326474f7c4984943324f182534e5",
   "title": "Army meteorological register, Camp Sheridan / Mammoth Hot Springs, September 1890",
   "license": "Public domain: United States Government historical record",
   "retrieved_at": "2026-10-07",
   "locator": "NCEI CL-1059, AE06167, image 00984; full monthly sheet"
  },
  "report": {
   "file": "brown-castle-geyser-1891/report-1891.pdf",
   "url": "https://archive.org/download/reportofsuperint1891unit/reportofsuperint1891unit.pdf",
   "sha256": "59329c816af70f721668a35a6275990d9e7b24257a4bb0e0632773982195deb4",
   "title": "Report of the Superintendent of Yellowstone National Park (1891)",
   "license": "Public domain: United States Government historical record; Brigham Young University / Internet Archive scan",
   "retrieved_at": "2026-10-07",
   "locator": "Printed pp. 14–15, PDF pages 29 and 31; IA catalogue date 1885 is a metadata error, title page says 1891"
  },
  "transcription": {
   "file": "brown-castle-geyser-1891/mammoth-september-1890.json",
   "url": "https://archive.org/details/reportofsuperint1891unit/page/n29/",
   "sha256": "1e3902002acb7db133da5edd1f86a9d2d727b83d48581225d2bdd3e871512d39",
   "title": "Nephos transcription of September 1890 thermometer readings",
   "license": "Nephos transcription of public-domain numerical tables",
   "retrieved_at": "2026-10-07",
   "locator": "All 30 daily maxima and minima; source discrepancies and null reasons retained"
  },
  "noaa-index": {
   "file": "brown-castle-geyser-1891/noaa-1890-index.json",
   "url": "https://www.ncei.noaa.gov/access/services/search/v2/publications/forts-publication?startDate=1890-09-01&endDate=1890-09-30&State=WY&limit=100",
   "sha256": "4366db1742e213e1c8a6e9341eea445005576943470f97fe930c4043f29f7671",
   "title": "NOAA NCEI pre-Weather Bureau index, Wyoming, September 1890",
   "license": "NOAA public data; credit NCEI",
   "retrieved_at": "2026-10-07",
   "locator": "41 returned records; Camp Sheridan indexed at placeholder coordinates 0,0"
  },
  "forts-format": {
   "file": "brown-castle-geyser-1891/forts-format.pdf",
   "url": "https://mrcc.purdue.edu/files/FORTS/DSI-3297-CDMPFortsFormatDocument_Mar2010.pdf",
   "sha256": "3ade954c6c3f982ce8ab390f776f17cee7dce1b884e33e955a32a780db5a7cdf",
   "title": "NOAA/CDMP, Forts data format (March 2010)",
   "license": "US Government data documentation, hosted by MRCC",
   "retrieved_at": "2026-10-07",
   "locator": "Thermometer units documentation; not a substitute source of daily values"
  },
  "castle": {
   "file": "brown-castle-geyser-1891/nps-castle-history.html",
   "url": "https://www.nps.gov/features/yell/tours/oldfaithful/castleg.htm",
   "sha256": "301e53a8de77be6de7423022607f528d3df980c61c19ff6b85d9eebc50cf490f",
   "title": "National Park Service, Castle Geyser, Old Faithful area tour",
   "license": "US Government interpretive text",
   "retrieved_at": "2026-10-07",
   "locator": "Historical variability of eruption pattern; present-day intervals not back-projected to 1890"
  }
 }
}