For this particular hook I used a piece of split and dried rowan, a halibut bone (for the barb) and sinews for binding. This binding has to be waterproofed however, so I am looking to replace it with spruce rootlets in the spring. Below:
Carve the lower end to fit the barb.
Thin the rest of the hook and bind it, but sinew can't be bound in the same way as roots, which is much more elegant. I will show how to do that later.