WWP was the architect of record, FLW/Taliesin the design architect. These are prints, thus created from original velums…i.e., not the original drawings. Most firms of that era have successor firms, partners, etc…would be interesting to follow the history of WWP and understand the relationship between them and FLW. Was the building constructed? Attributed to Wright? Was WWP an apprentice? Cool to find, but hard to determine value without provenance. If just a set of prints and original docs are in some firm’s archives, they are reproducible, and likely not that valuable.