Found this the other day: the early 19th c thieves of London were no fools and quite redpilled.
It struck me that a lot of the terms here could be "recycled" to add a layer of coding to modern language and any of these could be used as real-world identifying "in-words" which is exactly what the thieves' cant was all about.
Pulled this book from:
http://pdfbooks.co.za/books
>tons of good shit