PRIMARY SOURCE TRAIL

This shelf is intended to be a starting point, not a substitute for the
collections themselves. Open the scans. Read the catalog records. Follow the
references and preserve uncertainty where the source does not answer a
question.

MAPS AND CARTOGRAPHY

Library of Congress, Map of the Great Tartary
https://www.loc.gov/resource/wdl.15038/

Library of Congress, Abraham Ortelius map guide
https://guides.loc.gov/abraham-ortelius/featured-selection-of-maps

David Rumsey Historical Map Collection
https://www.davidrumsey.com/

Mark C. Elliott, The Limits of Tartary
https://doi.org/10.2307/2658945

ARCHITECTURE AND ENGINEERING

Chicago Water Tower, Historic American Buildings Survey, Library of Congress
https://www.loc.gov/item/il0097/

Brooklyn Bridge specifications, Library of Congress
https://www.loc.gov/item/2007570228/

Brooklyn Bridge, American Society of Civil Engineers
https://www.asce.org/about-civil-engineering/history-and-heritage/historic-landmarks/brooklyn-bridge/

Encyclopedia of Chicago, Construction
https://www.encyclopedia.chicagohistory.org/pages/331.html

CHICAGO GRADE CHANGES

Street Raising on Lake Street, Encyclopedia of Chicago
https://www.encyclopedia.chicagohistory.org/pages/3292.html

Multicentered Chicago, Encyclopedia of Chicago
https://www.encyclopedia.chicagohistory.org/pages/854.html

Ellis Sylvester Chesbrough, ASCE
https://www.asce.org/about-civil-engineering/history-and-heritage/notable-civil-engineers/ellis-sylvester-chesbrough/

SEATTLE REGRADE

Seattle Municipal Archives, A City at Work
https://www.seattle.gov/city-archives/exhibits-and-education/online-exhibits/a-city-at-work

Denny Hill Regrade Photograph Albums
https://archives.seattle.gov/finding-aids/repositories/2/resources/451

WORLD'S FAIRS

Library of Congress, Chicago in 1893: Selected Maps
https://blogs.loc.gov/maps/2024/12/chicago-worlds-fair-selected-maps/

Official Directory of the World's Columbian Exposition
https://www.loc.gov/resource/gdcmassbookdig.officialdirector00worl/?st=gallery

Smithsonian Institution Archives, Exposition Records
https://siarchives.si.edu/collections/siris_arc_216677

STAR FORTS AND CHILD WELFARE

National Park Service, Bastions at Castillo de San Marcos
https://www.nps.gov/casa/learn/historyculture/bastions.htm

Library of Congress, A Treatise on Field Fortification, 1860
https://www.loc.gov/resource/gdcmassbookdig.treatiseonfieldf00maha_0/?st=gallery

Library of Congress scan discussing orphan trains and child welfare history
https://tile.loc.gov/storage-services/master/gdc/gdcebookspublic/20/21/75/86/21/2021758621/2021758621.pdf

SOURCE RULE

Wikipedia, modern blogs and conspiracy sites can help locate a lead. They
should not be the final authority when an archive, survey, official report,
book scan or scholarly article is available. A claim about a map should lead
to the map. A claim about a building should lead to the building record. A
claim about a city project should lead to the city record.