"Ltn-Cousinjack-1.m4v" appears to be a specific video file related to the history of and the "Cousin Jack" diaspora . In historical contexts, "Cousin Jack" was a common nickname for skilled miners from Cornwall who emigrated globally during the 19th century. 🛠️ The Legacy of the "Cousin Jack"

England - Cornwall - I'm alright Jack - Article Page 1 - BBC

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They were considered the "aristocracy of mine labor" due to their advanced hard-rock mining skills and steam technology.

Between 1815 and 1915, approximately 250,000 people left Cornwall as its tin and copper mines began to fail.