Miss Watts, The Ladies' Knitting and Netting Book
“ In double knitting you cannot very well increase oftener than every 3 rows, as you do not complete the increase in less than 3 rows. In the 1st row knit 1 stitch behind wherever you wish to increase; in the 2nd row do the same to the stitch adjoining, and in the 3rd row when you come to the increase, knit 1 [92] stitch, and pass the next upon another needle, bring the thread forward slip a stitch and replace the one from the 3rd needle, knit it, and continue the row. You will perceive that you cannot increase less than two stitches at once. ”
