That which is sewed with the needle.
This refers to any seam, including sewing a whip stitch where the hole or stitch path does not pass from one side of the leather to the other, or only shows the thread on one side of the work. “The Sewing” refers to the Inseam holding the overleather, the welt, and the sole of a turn-shoe, or the insole of a double soled shoe or modern unturned shoe. This uses a curved awl which only pierces part-way through no matter the pathway (See Split Stitch, "making a split passage"), such as "whipping". [Saguto] When the awl, and subsequently the thread, pass partially through the thickness of the leather, as with edge/flesh seams. [Goubitz, 2001
joining or attaching by stitches