The Bastard File - History & Lore

Today we're taking a look at the various origin stories for the "Bastard" file.
Why does it have that name? Isn't it a dirty word?
Why would you call a hand tool a "bastard"?

(all celebrity depictions impersonated as satire)

The Duke of Northumpton:
https://en.wikipedia.org/wiki/John_Dudley,_1st_Duke_of_Northumberland

The Barsted Theory:
https://www.google.com/books/edition/Glossary_of_Metalworking_Terms/6zTREw5lrjMC?hl=en&gbpv=1&dq=barsted+file&pg=PA50&printsec=frontcover
https://www.google.com/books/edition/Audels_Machinist_and_Tool_Makers_Handy_B/qdOXRfY8tXgC?hl=en&gbpv=1&bsq=Audels+barsted&dq=Audels+barsted&printsec=frontcover

Further Reading:
https://www.wonkeedonkeetools.co.uk/files/how-did-bastard-files-get-their-name
https://gfdjewelry.com/2023/09/the-fascinating-tale-of-the-bastard-file/

Chapters:
00:00 Intro
00:25 The Duke of Northumberland
01:36 The Barre Sinister
02:36 Mr. Barsted's Files
03:46 Hardware Store Joke
04:44 The Simplest Theory
05:45 Outro