Well, I tried an experiment today with knitting. I knit a pouch out of some linen rug warp I had on hand to see how it would come out. I still can't say one way or the other whether the original was knitted, but I can say that it wasn't knitted the way I tried to do it. Some features of my test look like they match the original, and some don't.
Aside from looking somewhat sloppier than I'd envisioned, the shape is much too short for how long it is. This could easily be fixed by knitting more rows between increases, but the problem is that the borders on the original are even and continuous, so whatever is done at the edges would have to be done every row. Unless of course the borders were made after the center part, in which case my idea of comparing different samples would not work since the same border could be put on any type of center. The borders of my test don't match the sketch, although they do bare a slight resemblance.
One thing that did seem to match was the end of the pouch when I finished the decreases. The first photo shows this stage, and I think that it does look similar to the sketch.
A note on the stubs of the cords:
Assuming that the little piece of cord pictured above the sketch is from the sling, I used a technique that I learned from the Ashley Book of Knots, in the chapter on chain sinnets. It's a sort of two-stitch knit-like chain that is almost impossible to tell apart from an 8-strand square braid without examining the internal structure. Looking at the sketch, it seems that the cord was made with loops, and since this type of chaining transitions to and from knitting with ease, I opted to use it.
It’s a pity we can't look at the reverse side of the sling, because that would be a dead give away to the construction.
Comments and criticisms are most welcome.
-Timothy Potter