On 2nd chord, 3c+4c change sides (to 1,2,3x,4x)
Square set, with 5c in the middle facing 1c.
Note: The dry white sands on the north-west side of the Isle of Eigg are said to produce a musical sound when walked upon.
Note on [27-28]: originally 2 PdB. modified by Drewry to SkCh. O. Otto says best variant is corners in PdB, 1c in SkCh