The patterns for this stole have been taken from Knitting Lace by Susanna E Lewis, published by Taunton Books. This book is a dictionary of the patterns in a 19th Century lace sampler in the Brooklyn Museum.

Pi shawls are based on the mathematical principle that the circumference of a circle doubles as the radius doubles.

In knitting terms this means that if you knit a shawl where the number of rows doubles when the number of stitches doubles, you will end up with a circular shawl.

The shawl is worked from the centre out, and can be stopped at any point should you want a smaller shawl. It can also be worked in other thicknesses of yarn to give a different sized shawl.

Featured as Prospect Park in The Knitter, using The Fibre Company Meadow.

Yardage equals 3 balls of The Fibre Co Meadow (Lace weight; 40% wool, 25% llama, 20% silk, 15% linen; 498m/545yds,100g), shown in color Pennyroyal.