As for the use of horizontal plank infill in timber frames in NE Europe check out this site showing a reconstruction of a boat shed using the "bul-teknik" like i mentioned earlier (bulhus, translates as "bole house", bole as in the trunk of a tree from the original plank material of split tree trunks rather than planks). This Stavgard looks like an interesting place.

http://www.stavgardgotland.com/husen.htm

In Sweden the horizontal plank method is skiftesverk which translates as "shift work" possibly relating to the planks shifting or sliding into the grooves.

http://sv.wikipedia.org/wiki/Skiftesverk

Jim