Plaiting and braiding have a long history. They encompass decorating hair, weaving and basket-making as well as making knots. So it is surprising that John Gorham seems to have been the first person to have looked at the subject systematically. The main part of this book is a reprint of his 1888 work on plaiting crystal models has been an inspiration to many others working in this field, notably Robert Pargeter and Jean Pedersen. Along with Robert Pargeter and James Brunton's articles in the Mathematical Gazette Gorham's work is here reproduced. The ideas were extensively covered in...