Mathematical Patchwork

There are two main forms of patchwork that I have come across. "English" patchwork is mainly based on tessellations, largely of squares and hexagons. "American" patchwork or "piecing" is usually based on patterns in squares that are built up into the finished quilt. There are many different kinds of designs. I find those based on an octagon in a square the most satisfying.

This pattern is called "Castle Wall". One square (made larger than usual) is a cushion cover.

Here are some of the stages in making the design:

My next octagon-based patchwork was a wedding present. The design is called "Kaleidoscope". Here is a small section of the finished quilt:

The basic square is shown below on the left and on the right you can see what it looks like when it is put together:

Colouring it brings out the interlocking, almost circular, shapes in the design:

Now I have started to make another quilt. It is a pattern known as "World without end" and it too is based on an octagon in a square.

The Kaleidoscope pattern is turned about so that the square is the centre of the pattern piece instead of the octagon. Two of the isosceles triangles are joined and then sliced the other way to make half of a rhombus.

These diagrams show the transformations required:

It looks like this when the squares are put together:

Again the design looks different when it is coloured. The changes are even more noticeable when the quilt is "pieced" from fabric.These are the first four squares out of thirty-six!

• The best book on the subject is, amazingly, still in print after 24 years: Jinny Beyer Patchwork Patterns published by Bell & Hyman 1982.
• Website: http://homepages.which.net/~jenny.murray/patchwork.htm