This section is from the "Hand Sewing Lessons" book, by Sarah Ewell Krolik. Also available from Amazon: Hand Sewing Lessons: A Graded Course For Schools And For The Home.
Cotton, 5 inches square.
Two lengthwise pieces of cotton: 1x3 inches for faced hem, and 21/2 x3 inches for extension hem.
Double the square parallel with the warp, and cut a 21/2 inch slash through the fold. Clip this opening at the angle, as in Illustration 28. Make a faced hem on the right for buttons, and an extension hem on the left for button-holes. The extension hem should be joined so as to fold back on the upper side beyond the seam. Draw a thread near each edge of this fold. Backstitch on these lines and twice across the fold at the angle of the opening.
Make two button-holes, each 3/8 inch in size, on the extension hem, and sew buttons to match on the faced hem.
Illustration 29. Inch measure.