THE VIKING SHIP MUSEUM
'(<a href="http://www.j-archive.com/media/2009-01-09_DJ_24.jpg" target="_blank">Sarah of the Clue Crew reports from the Viking Ship Museum in Roskilde, Denmark.</a>) No Viking ship has yet been found with well-preserved sail & rigging; sails are recreated using wool or flax, & <a href="http://www.j-archive.com/media/2009-01-09_DJ_24a.jpg" target="_blank">ropes</a> are often made with the skin of this tusked mammal'
a walrus