(ch a multiple of 4 sts + 3)
Row 1 Yo twice, insert hook in 5th ch from hook and draw up lp, *yo and draw through 2 lps (3 lps on hook and first leg of CrTr), yo, skip 1 ch, insert hook in next ch and draw up a lp, [yo and draw through 2 lps on hook] 4 times (1 lp on hook and 2nd leg of CrTr), ch 1, yo, insert hook in middle of CrTr where legs meet and draw up lp, [yo and draw through 2 lps on hook] twice—CrTr completed, ch 1, skip 1 ch, yo twice, insert hook in next ch and draw up lp; rep from *, end CrTr in last 3 ch. Turn.
Row 2 Ch 4, skip first st and ch-1 sp, *CrTr over 2nd leg of CrTr and first leg of next CrTr of previous row, ch 1; rep from *, end CrTr over 2nd leg of CrTr and top of ch-4 t-ch of previous row. Turn.
Rep row 2.
Stitch directions reproduced with permission, from Vogue Knitting Stitchionary: Volume Four, Sixth & Spring Books, 2007