Between Two Lakes

On 2nd chord, 3c & 4c cross to opposite sides (1,2,3x,4x)

1c & 4c cross RH | cast inwards (2c & 3c out) ; 1c+4c LHA (2,1x,3x,4)
2c+1c & 4c+3c RHA, 1c & 4c end facing down/up on sides ; 1c & 4c pass LSh, loop LSh round cnr on same side, pass LSh to face 2c/3c on sides while{4} 2c & 3c set adv on diagonal | retire (2,1x,3x,4)
2c+1c & 4c+3c turn 1½ BH on sides and open out | 1c+2c & 3c+4c circle4 to L, end facing down/up NHJ with P (1x,2,3x,4)
Through the mirror rondels: 1c+2c & 3c+4c each start rondels with 2c & 3c making arches on [1]. On [2-3] 2c & 3c continue as normal but 1c+4c ½ circle4 to L to join other rondel for [4-8] with M making arches on [4] and 2c & 3c again making arches on [7] to finish as (2,4,1x,3x).
Longer instructions are at