Shakespyeare: Day 191 - Finnish Magic

Shakespeare is always up for a shoutout to parts partly unknown (see the coast of breast implants). In The Comedy of Errors, Bill gives a nod to his northern neighbors who apparently have quite the reputation:

               Sure these are but imaginary wiles,

               And Lapland sorcerers inhabit here.

Follow-up googling has led to no satisfactory explanations of what the bard had in mind concerning Finnish magic, though sources assure me that English literature is rife with vague references to the still (in the 17th century) unconverted peoples of Finland, but I did find this great walrus hunting picture: