The six nymphs in Chapter X of ATWF are not, strictly speaking, Leisenring's. He was not happy about being forced to add them to the book, but Pete insisted that the Nymph Chapter needed more content. Jim and Pete selected these six patterns together, basing them partly on patterns published by Skues, but Jim shunned them. When admirers asked him to tie a set of flies from the book, he did not include them. The only nymphs that Jim did include in these sets were the Tup's and the Iron Blue Nymph, which bring the total number of nymphs in the book to eight. So we might consider the six swap nymphs to be orphans, never quite accepted by Jim Leisenring, even though they appeared in his book.
In later years Leisenring became more interested in these orphan patterns, and began exchanging flies and letters with Skues, who was their originator.
I have photographed Pete Hidy's version of the first pattern on William's list, and attach it here.

I wasn't sure whether to insert this information into the swap string, and perhaps I should have. Think of this as a parallel research post to support the swap string.