**Extraction & Synthesis for the “Ellis Medical and Historical Collection, 1851”**

```cheimarros
# --- Collection definition (synthesised from PINAX metadata) ---
@ellis_collection_1851:concept {
    title: "Ellis Medical and Historical Collection, 1851",
    creator: @ellis,
    institution: @drexel_university,
    year: @date_1851,
    language: "en",
    description: "A collection containing medical treatment texts and high‑resolution images from the 1851 Ellis Collection, discussing various diseases, their treatments, and emphasizing the importance of a healthy diet, exercise, and mental well‑being.",
    subjects: ["Medical treatment","Disease","Health","Nutrition","Therapy","High Resolution Images","Historical Images","19th Century Medicine"]
}

# --- File‑level metadata (extracted from pinax.json) ---
@file_pinax -> describes -> @ellis_collection_1851:concept {
    source: "PINAX",
    access_url: "PLACEHOLDER"
}
@file_pinax -> part_of -> @ellis_collection_1851:concept

# --- Core components of the collection (already defined, now linked) ---
@medical_treatment_content:document -> part_of -> @ellis_collection_1851:concept
@ellis_collection_1851:concept -> includes -> @medical_treatment_content:document

@high_resolution_images:concept {
    description: "High‑resolution photographic images compiled by Ellis in 1851"
}
@ellis_collection_1851:concept -> includes -> @high_resolution_images:concept

# --- Images (already linked to the medical content; now also linked to the collection) ---
@file_a072_1851ellis_021_jpg -> part_of -> @ellis_collection_1851:concept
@file_a072_1851ellis_022_jpg -> part_of -> @ellis_collection_1851:concept
@file_a072_1851ellis_021_tif -> part_of -> @ellis_collection_1851:concept
@file_a072_1851ellis_022_tif -> part_of -> @ellis_collection_1851:concept

# --- Person & Institution roles (synthesis across subdirectories) ---
@ellis:person {full_name: "Ellis", role: "author & photographer", active_years: "mid‑19th century"}
@ellis -> authored -> @medical_treatment_content:document
@ellis -> photographed -> @high_resolution_images:concept

@drexel_university:organization {type: "University", location: @philadelphia}
@drexel_university -> holds -> @ellis_collection_1851:concept
@drexel_university -> created_by -> @file_pinax

@philadelphia:place {state: @pennsylvania, country: @united_states}
@philadelphia -> part_of -> @pennsylvania:place
@pennsylvania:place {country: @united_states}
```

### Synthesis Highlights
- **Unified Collection:** The `@ellis_collection_1851` concept now **integrates** the medical treatment document (`@medical_treatment_content`) and the high‑resolution image set (`@high_resolution_images`), reflecting the dual nature of the PINAX metadata.
- **Cross‑Subdirectory Links:** The same `@file_pinax` metadata file appears in both the *Medical_Treatment_Content* and *High_Resolution_Images* subdirectories, serving as the bridge that ties together textual and visual materials.
- **Multi‑role Individual:** `@ellis` is identified both as the **author** of the medical text and the **photographer** of the image collection, demonstrating a single contributor’s impact across distinct content types.
- **Institutional Custody:** `@drexel_university` is explicitly linked as the **holder** of the entire collection, grounding the archive within its academic context.