
Working sinew during the Columbia River canoe trip, 1987. See also posts 01, 04, 07 and 13. In post 13 I showed a quicky bow and arrow and one of the fish obtained with them. There is a hierarchy of Stone Age weapons or tools for obtaining game progressing from the club to spear to atlatyl to bow and arrow.
A club is the least effective, but it's the easiest to acquire. I've killed porcupines with clubs (actually, a club is the best weapon for porcupines--I'll elaborate on that in another post).
A spear is the next easiest to obtain. I've just read a news account of chimpanzees making crude spears and getting bush babies with them. I also used a spear and I did catch fish with it, but it was a short-range weapon, and I found it quite difficult to stalk the fish and get close enough to use it.
An atlatyl is a stick used as kind of an arm extension for throwing spears a greater distance. Inuit (Eskimos) and Australian aborigines used atlatyls until fairly recently. But I can't imagine anyone preferring the short range atlatyl if they had the proper materials and knowledge for making the longer range bows and arrows. Inuit had the knowledge for making bows but they seldom had suitable wood in the far north.
Just having the knowledge of how to make something does you no good if you don't also have suitable materials. The usual obstacle to quickly making an effective bow in a survival situation is the lack of a suitable bowstring. Vegetable fibers, such as from nettle, may be available in the local area--but only at certain times of the year. There is commonly a processing procedure that takes time. Also, most vegetable fibers available quickly in the wilderness just aren't strong enough.
The best natural bowstring material that I have found, it's just as effective as the synthetic polyester, is sinew. But here again, you're not going to find any ready to use and just laying around out in the wilderness. When you do kill a large animal, or come across the carcass of one recently killed by a cougar or such, you must cut out the sinew and carefully hoard it for future use. (And the rawhide as well.)
Sinew is tendon. The thickest pieces of tendon come from the lower leg, and you want to extract that tendon in pieces as long as possible. The muscle on a deer's back is covered with a thin shiny sheet of the same material, and you also save this in pieces as long as possible, but this back tendon is too valuable for splitting into sewing thread to use for most other things.
After acquiring from a carcass, the leg sinew must be dried thoroughly, and of course, that takes a little time. In the photo above, a piece of dried leg sinew is shown on the right. Then you lay the dry sinew on a solid log--or a big smooth rock--and you take a husky club and beat on it. You have to really put some muscle into this. Sinew is tough.
When the thick piece of sinew is pretty well squashed, you use your thumbnails to pull long fibers off of it. Those soft fibers will typically have a hard lump right at the end where the sinew was originally cut. Those lumps must be pulled off with your thumbnail. If you can't pull them off, your fiber is too thick and it must be separated into finer pieces. Each fiber should taper to nothing at each end.
Commercial cordage and rope is typically composed of three strands twisted together. That makes for nice round rope, but it's difficult to do in the woods. Aborigines settled for two strands. To start, you take six or seven of the sinew fibers (pictured on the left side of the photo) and at the center of the fibers you twist them tightly together for a couple of inches. Looking from either end, the twist should be clockwise. (Reverse all these directions if you're left handed.) Then you fold the ends toward each other. The twisted center part tries to untwist and it locks itself into the start of a two-strand cord with the two strands twisted together counterclockwise. What holds the cord together is the counterclockwise strands fighting the clockwise fibers.
To make your embryonic cord longer, you add fibers to each strand. You hold the point where the two strands merge to become a cord between the thumb and forefinger of your left hand. You take the fibers of one strand between the thumb and forefinger of your right hand and twist the fibers clockwise. At the same time, you pull that twisted strand over the other strand in a counterclockwise direction and snug it under your thumb to hold it twisted. You just keep doing that until you have a nice long bowstring as is pictured at the center of the photo.
Aborigines made a lot of cordage for various uses and they often laid the fibers of both strands on their thigh and twisted them simultaneously by rolling them against their thigh with the palm of their hand. The twisted fibers then automatically twisted the strands together. For a bowstring I think it's stronger to twist with the fingers.