Here’s a web page that will interest you. Iron-making in the Viking age.
http://www.hurstwic.org/history/articles/manufacturing/text/bog_iron.htm
In a later age it was the Scots who traveled, traded, explored and innovated. America owes a great deal to that diaspora.
https://www.alibris.com/The-Scottish-Empire-Michael-Fry/book/5941813?matches=8
(Ignore the squib. Written by some malcontent who hated the Scots. Probably an Irishman.)
Thanks.
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