Take a handful of cotton batting, rub it in the box of crayon sauce, and then on a piece of paper before applying it to the crayon paper to make the background, being careful to avoid rubbing harder in some places than others, as dark spots are likely to be caused in that way. Commence by rubbing in close to the face and work out towards the edge of the paper. Let the darkest part be closest to the face, shading out in the form of a circle about six or eight inches from the face, according to the subject, the upper line of the arc coming a little above the head. Then make the cast shadow and finish with the large rubber eraser, putting the lights, or cloud effect, as it is called, in the background. When doing this, place the strainer high enough on the easel to bring the centre of the picture on a level with your eyes, then standing in front of it and about six feet off, decide upon your plan of light and shade. After you have put in the first of the lights, step back to the former position, and see if it gives the proper effect. Continue this method of working until the background is entirely completed.