Legend
About This Map
This interactive map visualizes the activities of Pinkerton detectives across the United States. Each marker represents locations where detective work was conducted, including surveillance, investigations, and other operations.
How to Use
- Click markers to view detailed activity information
- Use the filter bar to switch investigations, view modes, and basemaps
- Open the Activities panel at the bottom to filter by activity type or animate the timeline
- Marker sizes indicate the number of visits to each location
Data Sources
The data comes from historical Pinkerton detective reports and operational records.
Developed by the Roy Rosenzweig Center for History and New Media at George Mason University.
Filtering:
Click a bar to filter, or press play
Using the Activities Timeline
Timeline Bars
Each row represents an activity type (surveillance, shadowing, interviews, etc.). The bars show the specific days when that activity was recorded during the investigation. Click any bar to filter the map to only that activity type.
Animation Controls
- Play / Pause — Animate through the investigation day by day. Markers appear on the map as activities are recorded, growing in size with each new visit.
- Reset — Return the map to its original state showing all activities at once.
- Daily — Toggle between cumulative and daily-only view. In cumulative mode (default), markers build up over time. In daily mode, only the current day's activities are shown, making it easier to see each day's work individually.
Tips
- Combine the activity filter with animation to watch how a single activity type unfolds over time.
- Switch between view modes (All, Location Types, Activity Types) in the toolbar above for different perspectives on the same data.
Click on a marker to view details
Date:
Time:
Duration:
Location:
Address:
Locality:
Operative:
Subject:
Information:
Source:
Mode:
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