This special cast on is my adaptation from the “montage croisé formant une chaîne” (Cast on crossed making a chain) explained by Thérèse de Dillmont in her book Encyclopédie des ouvrages de Dames. This cast on is worked quite in the same way as the continental cast on. It gives a nice, decorative and stretchy border that bundle the stitches two-by-two.
Make a slip knot and then work 1st st holding the yarn from the ball over your finger and the end tail of yarn placed from the inside of your palm around your thumb: