We used to attend a Maths Conference, every year organised by a teaching association. At one particular conference we attended a workshop about Roman surveying. We should have been outside using equipment such as the Romans would have used but there was a howling gale so we had to work on a smaller scale inside. It was still geometry on a very large scale so was very appealing. Although we were not able to do the planned activities, the tutor was obviously accustomed to the vagaries of the British weather and was very well-equipped with other material.
There was a great deal of discussion loosely related to the topic and some of it revolved around tessellations of various kinds, including mosaic floors. The Roman name for one of the small blocks used in a mosaic is ‘tessera’. This is the derivation of our word ‘tessellation’, which means fitting shapes together. We saw many other patterns and tessellations that we were to return to later.
I did knit! I used the Kaffe Fassett method with two ‘magic balls’. I had quite a lot of oddments of yarn but had now reached the stage where I had to go out specially to buy oddments. These can often be bought cheaply as it doesn’t matter if they are damaged, or without their bands, or even part balls. Quite a lot of balls are needed to get a good range of closely related shades. I used cream, beige, light brown and stone-coloured yarns for the background and the darkest possible not-quite-black yarns for the lines.
I used Robert’s grid as the back of my jacket, using two stitches by two rows for each of his squares. This does not give squares in stocking stitch but that was to my advantage. The resulting piece wasn’t quite big enough to make the back of my jacket but I knew that before I started. I added extra stone-coloured borders to make it up to the right size. The front was the same design split in two. The sleeves had lines of pattern taken from repeating parts of the mosaic. When the jacket was finished the curators of the museum were kind enough to allow me to be photographed standing in front of the actual mosaic, which is now attached to a wall.
I had a lot of yarn left over, after buying so many shades, so went on to make another sweater based on the meander mosaic at Herculaneum.