I did a little more work on the sample of York språng pattern and then I quit, and took it off the frame. This pattern really needs a wide warp, not a narrow warp.
At the end of this how-to video about the York pattern I show the sample as an example of what not to do.
It is one thing to be able to do the pattern and another to attempt a pair of stockings. Pity Collingwood doesn't give more context in his book, some idea of how large, how many threads, what type of yarn. I have tried to discover what museum collection holds the piece, so far without success.