The next step is complete. The warp is sleyed through the reed and tied on to the apron rod. Look through to the back of the loom. See all those scary twists in the warp? I don't know what went wrong, but it seems to be weaving okay. So far at least.
I've woven six inches or so since taking this picture. The warp is white and the first tea towel has a green weft. There should be enough length in the warp to do four altogether and one of the others will be blue. Pictures tomorrow of the weaving in progress.