Archaeologists suggest Neolithic Scandinavians may have used skin boats to hunt
phys.org
2 threads
Andreas Paabo described ocean-crossing skin boat culture already some 30 years ago. http://www.paabo.ca/uirala/ui-ra-la.html
Well, it's also known that the Irish did so; their word for this sort of vessel was (is?) _currach_ or _curragh_.
What I'd really like to know is why there's a province of Sweden named "Västmanland".