MISS MACKENZIE's STRATHSPEY 180, #400
http://www.vwml.org/browse/browse-collections-dance-tune-books/browse-prestons1800#recordnumber=7SI
Bb, 2/4 (lot of forte and pinao marks trying to indicate the scotch snap,
I think)

1s and 2s set and hands 4 half way
set and hands *across* back again
1s cross over 1 couple and turn 
right and left (with third couple if triple, with second if duple)