(Slip-st through rib st) 14 times, ending 1 st in from right edge of back rib; working lengthwise toward bottom (slip-st) 21 times or number to end 2 rows above garter ridges; working across bottom of back rib (slip-st through rib st) 18 times, ending 1 st in from left edge of back rib; working lengthwise toward beg of slip-st, work same number of slip-sts as on right; working toward the left, (slip-st through rib st) 4 times, ending at beg. Do not cut yarn.