{
 "schema": "nephos.method.v1",
 "slug": "sharp-glacier-park-c1907",
 "title": "Joseph Henry Sharp, Glacier Park, about 1907",
 "urls": [
  "/studies/sharp-glacier-park-c1907"
 ],
 "written": {
  "summary": "The scholarly Sharp catalogue dates Yellowstone’s canvas to about 1907 and proposes a relationship to a larger Blackfeet-region landscape. Its description of flowers prompts a broad seasonal comparison, not a painting date.",
  "items": [
   {
    "quote": "ca. 1907",
    "source": "Buffalo Bill Center of the West, Sharp catalogue, record 725",
    "url": "https://centerofthewest.org/catalogs/sharp/?view_id=723"
   },
   {
    "quote": "Picture painted before hotel was built.",
    "source": "Sharp’s retrospective inscription on the separate Eiteljorg canvas, transcribed in catalogue record 560; August 1950",
    "url": "https://centerofthewest.org/catalogs/sharp/?view_id=682"
   }
  ]
 },
 "records": [
  {
   "name": "Columbia Falls 5 SW, USC00241919",
   "url": "https://www.ncei.noaa.gov/pub/data/ghcn/daily/all/USC00241919.dly",
   "detail": "Western regional context. Three complete May–September precipitation seasons; 40 complete same-station seasons retained for comparison. The scene is not located at this station."
  },
  {
   "name": "Browning and Babb 6 NE",
   "url": "https://www.ncei.noaa.gov/pub/data/ghcn/daily/ghcnd-stations.txt",
   "detail": "Eastern candidates were checked. Gaps prevent a complete three-year seasonal comparison; their exclusions remain in the linked data."
  }
 ],
 "gaps": [
  "No exact viewpoint, painting day, dated sketch or independent explanation of the circa date has been established.",
  "The larger canvas’s inscription is retrospective and belongs to another object; the hotel is not identified here.",
  "No local sky, snow-cover or flower phenology observation is inferred from the western station. Historical instrument exposures are unverified."
 ],
 "tests": [
  {
   "claim": "Does the park’s establishment in 1910 disprove the circa-1907 date?",
   "result": "No. The title alone does not date execution. The related canvas carries a later inscription; neither it nor park history proves when the Yellowstone canvas was painted."
  },
  {
   "claim": "What moisture context survives around the approximate date?",
   "result": "1906: 281.8 mm; 1907: 326.3 mm; 1908: 542.9 mm. These are recorded measurable precipitation sums at Columbia Falls for May–September, with trace amounts unquantified. The three years are examples around the catalogue date."
  },
  {
   "claim": "Do the flowers identify a wet year or a painted day?",
   "result": "No. Seasonal precipitation at a western station cannot establish conditions at an unlocated mountain scene or date the flowers."
  }
 ],
 "finding": "A possible relationship between two paintings helps frame the place question. Regional records supply context; the painted weather and exact date remain unknown.",
 "verdicts": [
  {
   "claim": "Weather depicted in the Yellowstone canvas",
   "verdict": "Unknown",
   "reason": "A circa date, broad region and flowers do not connect the picture to a particular observation."
  },
  {
   "claim": "What Sharp changed between the two views",
   "verdict": "Unknown",
   "reason": "The catalogue proposes a relationship, but no dated sequence or field-to-studio account has been established."
  }
 ],
 "limits": [
  "May–September 1906–1908 is an illustrative comparison, not a documented execution interval or the full uncertainty range of ca. 1907.",
  "Station distances are to a named modern East Glacier inventory point, not to an identified viewpoint. Across-divide weather can differ substantially.",
  "Ranks describe complete archived seasons, not a homogeneous climate normal. Traces are counted but not assigned a measurable amount; missing data stay missing.",
  "No image is reproduced because an open licence or written reproduction permission has not been established."
 ]
}