Dance Five-Couple MacDonald of the Isles (Big Mac) 12089

1–
: 2c+4c diagonal Reel4 with 1cnrs, at end pass P Lsh to face 2cnrs
9–
: 2c+4c diagonal Reel4 with 2cnrs (2cnr loop by the R) (to 1,2,3,4,5)
17–
: “Cumulative G-Chain” (1c+3c cross RH | 1c+2c & 3c+4c pass LH on the side (2,1x,4,3x,5) ; 2c cross RH and 1c+4c & 3c+5c pass RH on the sides) | 2c+4c & 1c+5c pass LH on the side as 3c cross LH (4,2x,5,1x,3)
25–
: 4c+2c & 1c+5c ½ R&L ; 4c+5c ½ Fig8 to the R (4W & 5M pass Rsh in the middle) (2,4,1,5,3)

{{explanation}}
(adapted from Derek Haynes “MacDonald of the Isles”

1-8
: 2s & 4s dance diagonal reels of four with 1st corners & end dancing LSh
  round partner to face 2nd corners
9-16
: 2s & 4s dance diagonal reels of four with 2nd corners & ending in
  original places
17-24
: All dance a Cumulative Grand Chain:

: **17-20** 1s+3s cross RH & face down, 1s+2s also 3s+4s change places on
  the sides LH

: **21-24** 2s cross RH as 1s+4s also 3s+5s change places RH on the sides,
  2s+4s also 1s+5s change pls LH on sides as 3s cross LH. 4(2)5(1)3
25-32
: 4s+2s also 1s+5s dance 1/2 R&L, 4s+5s dance 1/2 Figs of 8 (Men up,
  Ladies down). 2 4 1 5 3