**File‑level relationship**

@file_pinax -> describes -> @drexel_historical_collection  

**Collection metadata (first definition – already present, now enriched)**  

@drexel_historical_collection -> created {when: @date_1836_03_19}  
@drexel_historical_collection -> language -> "en"  
@drexel_historical_collection -> access_url -> "PLACEHOLDER"  
@drexel_historical_collection -> rights -> "Public domain"  

**Subjects (concepts created for this collection)**  

@homeopathy:concept {description: "System of alternative medicine based on the principle of “like cures like”"}  
@medical_correspondence:concept {description: "Exchange of letters and reports concerning medical cases"}  
@case_studies:concept {description: "Detailed examinations of individual medical patients"}  
@faculty_conduct:concept {description: "Standards and expectations for university faculty behavior"}  
@diploma_signing:concept {description: "Official endorsement of academic degrees"}  
@academic_policies:concept {description: "Regulations governing university operations"}  
@resolutions:concept {description: "Formal decisions adopted by an academic body"}  
@medical_treatments:concept {description: "Therapies applied to treat diseases"}  
@diseases:concept {description: "Pathological conditions affecting health"}  
@symptoms:concept {description: "Observable signs of disease"}  

@drexel_historical_collection -> includes_subject -> [@homeopathy, @medical_correspondence, @case_studies, @faculty_conduct, @diploma_signing, @academic_policies, @resolutions, @medical_treatments, @diseases, @symptoms]  

**Places (common and specific)**  

@allentown:place {full_name: "Allentown, Pennsylvania, USA"}  
@surinam:place {full_name: "Surinam"}  
@germany:place {full_name: "Germany"}  
@st_college:place {full_name: "St. College"}  

@drexel_historical_collection -> associated_place -> [@allentown, @surinam, @germany, @st_college]  

**Synthesis across subdirectories**

- The medical‑focused entities (@case_64, @case_65, @case_76, @spigelia_discussion) that belong to the **homeopathy** and **case studies** concepts are now explicitly linked to the overarching collection via the @case_* → part_of → @drexel_historical_collection relationship (pre‑existing) and the new @drexel_historical_collection → includes_subject → @homeopathy / @case_studies connection.  

- Administrative documents such as @letter_faculty_conduct and the concepts @faculty_conduct, @diploma_signing, @academic_policies, and @resolutions are likewise tied to the collection through the same includes_subject relationship, illustrating the collection’s dual focus on **medical** and **university governance** material.  

- Person @c_hering, who authored several case documents, now bridges the **medical** side (author of @case_* and @spigelia_discussion) and the **administrative** side (contributor to archival notes) within the same collection, highlighting interdisciplinary involvement.  

- Geographic references from the metadata (Allentown, Surinam, Germany, St. College) are unified under @drexel_historical_collection → associated_place, revealing the collection’s **multi‑regional scope** and indicating that the medical correspondence and faculty documents originated from or reference these diverse locations.  

- By defining the subject concepts, we can later connect them to other collections or publications (e.g., a separate “19th‑Century Homeopathy Archive”) through shared concepts, enabling cross‑collection queries such as “find all case studies related to @homeopathy” or “retrieve all faculty conduct letters across university archives.”  

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**Collection‑level abstraction**

@drexel_university_collection:document {title: "Drexel University Historical Collection", creator: @drexel_university, created: @date_1836_03_19, subjects: [@homeopathy, @medical_correspondence, @case_studies, @faculty_conduct, @diploma_signing, @academic_policies, @resolutions, @medical_treatments, @diseases, @symptoms], places: [@allentown, @surinam, @germany, @st_college]}  

@drexel_university_collection -> aggregates -> @drexel_historical_collection  

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**Cross‑source pattern**

The pattern emerging from the synthesis is a **dual‑domain integration**:  
1. **Medical domain** – homeopathic case studies, disease descriptions, treatment discussions.  
2. **Administrative domain** – faculty conduct, diploma signing, academic policies, resolutions.  

Both domains are interwoven within a single archival collection, linked by shared contributors (e.g., @c_hering) and geographic contexts, illustrating how 19th‑century university archives often combined scholarly, clinical, and governance records.