Please note the following corrections:

PARTIAL SQUARE - LEFT FRONT

Row 9 (RS) Sl st in each of next 2 dc and next ch-2 sp, ch 3, work 1 dc in same sp, *[1 trfp around next dc, ch 1, skip next dc] 15 times, 1 trfp around next dc**, work (2 dc, ch 2, 2 dc) in next corner ch-2 sp; rep from * once more, then from * to ** once, work 2 dc in next corner ch-2 sp. Fasten off.

Row 11 (RS) Join yarn with sl st in top of beg ch from last row, ch 3, work 1 dc in next st, [1 trfp around next dc, ch 1, skip next dc) 17 times, 1 trfp around next dc, (2 dc, ch 2, 2 dc) in next corner ch-2 sp, [1 trfp around next dc, ch 1, skip next dc] 19 times, 1 trfp around next dc, (2 dc, ch 2, 2 dc) in next corner ch-2 sp, [1 trfp around next dc, ch 1, skip next dc) 8 times, 1 dc in last st. Fasten off.

PARTIAL SQUARE - RIGHT FRONT

Row 10 (RS) Skip first 20 sts from previous row, join yarn with sl st in next trfp, ch 3, work [1 dc in next ch-1 sp, 1 dc in next st] 6 times, 1 dc in each of next 2 dc, (2 dc, ch 2, 2 dc) in corner ch-2 sp, then work 1 dc in each st and ch-1 sp to next corner ch-2 sp, (2 dc, ch 2, 2 dc) in corner ch-2 sp, then work 1 dc in each st and ch-1 sp to end of row. Fasten off.

Row 11 (RS) Join yarn with sl st in top of beg ch 3 from previous row, ch 4 (counts as dc and ch-1 sp), skip next dc, work [1 trfp around next dc, ch 1, skip next dc] 7 times, 1 trfp around next dc, *work (2 dc, ch 2, 2 dc) in next corner ch-2 sp, work (1 trfp around next dc, ch 1, skip next dc) 19 times, work 1 trfp around next dc; rep from * once. Fasten off.