The photo above illustrates the beginning of row 4 of the Shell Block Square pattern, showing where to crochet the shell when the directions instruct to make "3 dc in space between next two 3-dc shells".
That part of the pattern uses a technique of crocheting in a space between stitches, instead of the more common method of working under the top loop of the stitches.
For the free Shell Block Square pattern for a 9 - 10 inch square, click here.
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