The original tune is a hornpipe
The first two turns are in Strathspey time, the second two are in Reel time.
Bars 29-30: those 1st couples who find it uneasy or uncomfortable to pass back to back while turning by a quarter pulling back right shoulder (setting with the left foot!) can finish facing partner on bar 29 and just turn by a quarter remaining facing partner on bar 30. The most important thing is to be ready to retire at the same time as the other couples for covering.