Visit the real thing at Historic Jamestowne, explore the actual location and active archaeological dig, Jamestown Rediscovery, home of the first successful English settlement.
17th Century Caltrop #1
Visiting Historic Jamestowne In Virginia - No Home Just Roam
Caltrop (Tire Spike) - CIA
c. 1775 Revolutionary War Era, Hand-Made Caltrop Anti-Horse (Spike) Weapon sold at auction on 1st June
How did people in Ancient Times and Middle ages make fire? - Quora
New Discoveries at Jamestown, John L. Cotter, J. Paul Hudson
Splawn Family Travels: Jamestown
Caltrops - Encyclopedia of Greater Philadelphia
Museum of Ontario Archaeology - This caltrop is one of two military artifacts from Tecumseh Park in Chatham, Ontario, that were confirmed as War of 1812 era. It was recovered by Timmins
17th Century Caltrop #1
The Project Gutenberg eBook of New Discoveries at Jamestown by John L. Cotter and J. Paul Hudson