{
 "schema": "nephos.method.v1",
 "slug": "prendergast-rocky-shore-nantasket",
 "title": "Maurice Brazil Prendergast, Rocky Shore, Nantasket (ca. 1896–1897)",
 "urls": [
  "/studies/prendergast-rocky-shore-nantasket"
 ],
 "written": {
  "summary": "Nephos reads the light clothes, parasols, children, sails, blue sea and bright sky as a fair, sunny summer beach day. This is Nephos’s visual reading, not a museum statement. WCMA dates the watercolor approximately 1896–1897; the signature carries no date.",
  "items": [
   {
    "quote": "Smiling skies, the brightest blue old ocean ever wore",
    "source": "Weymouth Gazette, 1896-07-03, Woman’s Relief Corps at Nantasket",
    "url": "https://archive.org/download/WeymouthGazette189607/Weymouth_Gazette_1896_07_text.pdf#page=2"
   },
   {
    "quote": "every succeeding train handled a succeeding crowd of humanity",
    "source": "Weymouth Gazette, 1897-07-09, Brief Items / East Weymouth",
    "url": "https://archive.org/download/WeymouthGazette189707/Weymouth_Gazette_1897_07_text.pdf#page=7"
   }
  ]
 },
 "records": [
  {
   "name": "Blue Hill Observatory, Harvard Annals 42",
   "detail": "Published clear/fair/cloudy counts and monthly sunshine; 184 daily 2 p.m. whole-sky cloud observations. Inland summit, not Nantasket.",
   "url": "https://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1897AnHar..42....1R&defaultprint=YES&filetype=.pdf"
  },
  {
   "name": "Boston, Monthly Weather Review",
   "detail": "Separate monthly sunshine percentages and published day classifications in both summers; reporting practices not harmonized with Blue Hill.",
   "url": "https://archive.org/download/sim_monthly-weather-review_1896-06_24_6/sim_monthly-weather-review_1896-06_24_6.pdf"
  },
  {
   "name": "Modern Blue Hill, NOAA USW00014753 TSUN",
   "detail": "14 complete June–August seasons in 2009–2024. Incomplete 2017 and 2020 excluded.",
   "url": "https://www.ncei.noaa.gov/pub/data/ghcn/daily/all/USW00014753.dly"
  }
 ],
 "gaps": [
  "No source inspected links this sheet to a particular Nantasket visit or painting session; June–August tests its depicted summer subject, not its execution date.",
  "The published historical tables give monthly sunshine duration. The daily strip is cloud amount at 2 p.m., not reconstructed sunshine hours.",
  "Modern archive coverage does not support a 1991–2020 sunshine normal. Instrument comparability is unresolved."
 ],
 "tests": [
  {
   "claim": "How often did these summers offer a largely clear sky at Blue Hill?",
   "result": "20 of 92 days in 1896 and 16 of 92 in 1897 were classified clear. Including the much broader fair category gives 59 and 51; these are not counts of sunny beach visits."
  },
  {
   "claim": "How do the recorded sunshine totals compare with a modern run?",
   "result": "722.1 and 660.3 hours, versus 805.0 hours averaged over the 14 complete modern summers. A descriptive archive comparison, not a climate trend."
  },
  {
   "claim": "Do contemporary reports put crowds at Nantasket in these seasons?",
   "result": "Yes: a June 1896 reunion under smiling skies, and heavy train traffic on Monday 5 July 1897. Blue Hill recorded 3/10 cloud at 2 p.m. on the latter date; neither witness names Prendergast."
  }
 ],
 "finding": "A sunny seaside scene fits a recurring opportunity in both summers, though a largely clear day was a minority condition at Blue Hill: 20 and 16 days. Local reporting places crowds at Nantasket in the same seasons.",
 "verdicts": [
  {
   "claim": "Nephos’s sunny-summer reading against the regional records",
   "verdict": "Partially agrees",
   "reason": "Clear conditions recurred in both summers and contemporary reports describe Nantasket outings; these do not verify conditions at the painted rocks."
  },
  {
   "claim": "The painted day and actual weather at the rocks",
   "verdict": "Unknown",
   "reason": "No dated session or linked beach observation."
  }
 ],
 "limits": [
  "Blue Hill and Boston are regional stations. Neither is the painted scene, and their records are never pooled.",
  "Cloud amount, sunshine duration and a clear-day classification measure different things; none defines every pleasant beach day.",
  "The older sunshine recorder’s glass sphere was reported injured and replaced in January 1898; no bias correction or modern sensor harmonization is attempted.",
  "The composition source supports repeated colours and overlapping figures, not an alteration of observed weather or a documented outdoor/studio sequence.",
  "The underlying catalogue raisonné entry and archival object file were not inspected; they may narrow the date."
 ]
}