From Blackberry-ridge.com:
The Hap Shawl
Pattern by Hazel Carter
Skill Level: Advanced beginner
Gauge: approximately 4.3 sts = 1 inch

By request, here is a pattern for a traditional Shetland Hap Shawl shown here in five natural shades of gray, 100% wool fingering weight yarn. The finished size is approximately 54 inches. The instructions are provided for working from the outside in (traditional) and from the inside out. The traditional method is presented in both written and charted form, instructions for working from the inside out are only in charted form.