NavList:

I figured you missed the link.  It wasn't clear that it even was a link to the paper in the article (it is there, just very well hidden).  Further, the "science journalist" clearly failed to write a coherent article.  I stumbled over the same point you made, with a "say what?" to the author: "how did they correlate that?".  

After reading the actual, non-surprising result, to wit: if we know a date and recorded magnetic direction on that date, we can observe/confirm the drift,  I thought just to clarify the NavList record.  I like seeing those old stone walls.  We have them here on Long Island too, just not as prevalent. 

Brad