I used a small two hole punch I had picked up from a craft store some time ago to punch sewing holes around the edged of the hide. It is pretty light duty and I think intended for paper rather than leather, but it worked fine on this thin coyote hide and I have used it in the past for punching holes in tanned deer and elk skins for wrapping bow grips.
Not the prettiest job, but again, I aint sweatin the small stuff. Someday I will get a better punch for doing this kind of work.
Next I began sewing together the two pieces of hide, bottom to bottom, so the fur ran into each other at this seam. I used a curved needle and some artificial sinew for all of the sewing. Every now and again the needle didn't like going through the two layers of folded over cotton ticking (four layers where I was joining sides). So a little assistance from a hemostat to pull the needle through did the trick.
I began attaching the liner to the hide at what would be the top of the front panel. It would be a raw edge so running stitches over the edge, then through a punched hole in the hide then through the fabric seemed to finish it off nice enough.
In junior high school, much to my father's displeasure, I did take home economics one semester as an elective. We did have a sewing project. I learned in that class, when you sew something together like I was, it was best to sew it inside out then flip it right side out when completed. That is how I was going to sew this haversack.
Next I started joining sides. First was the bottom of one side panel to the bottom panel. Inside out.
These stitches would go through the folded over cotton ticking through a hole in the hide then find another hole in the other part of the hide and through two more layers of the folded cotton ticking. I spent a lot of time checking between stitches to make sure everything was staying lined up at the end so I would not end up with too much fabric and too little hide or vice versa.
Again, always making sure that at the end I finished with the same amount of hide and lining on both sides.