A series of talks by Mitford Mathews, editor of the Dictionary of Americanisms and lecturer in linguistics at the University of Chicago.An online collection of early educational public radio content from the National Association of Educational Broadcasters (NAEB).
https://www.unlockingtheairwaves.org/programs/american-language/
Further borrowing from the Indians
The third program in this series, "Further Borrowing from the Indians," continues to explore the influence that Native Americans had on the way colonists spoke English.