Well, I finally got around to trying my hand at making natural cordage. First, I located a willow shoot. Then I made a slit through the inner and outer bark, down to the wood. I carefully peeled off the bark. Then I separated the inner and outer bark. This was followed by cutting the inner bark into strips. The next step was to twist one of these strips over its entire length, until it wanted to kink (forgot to take a picture of this). I allowed it to kink (which became the end of the cord), while continuing to twist the two strands. The way I did this was to roll the strands on my leg with my fingers and palm. When I was finished making the short piece of cord, I tied off the end. It's not long, but I think it's OK for a first try. I tested its strength by pulling on it until it broke. It was surprisingly strong. Later on, I made a slightly longer piece. I was happy to find that making cordage like this is really easy. I don't think it will replace my paracord anytime soon, though.