This section is from the book "School Needlework. A Course of Study in Sewing designed for use in Schools", by Olive C. Hapgood. Also available from Amazon: School Needlework: A Course Of Study In Sewing Designed For Use In Schools.
Catch-stitch is a kind of cross-stitch, used to secure the edges of flannel.
Fig. 89. - Showing catch-stitches, and the needle in position; the straight lines represent the threads of the canvas.
Fig. 90. - Showing a corner turned, and the needle in position for turning a corner.