Curtis Hale has been doing a lot of research and documentation of the creation of Cream Legbars and hopefully soon will be ready to share his work.
The writing is done. It still needs some swanky pedigree trees to be put together to show all the recorded crosses though. The Cream Legbar Club's Breed History will be the first place that I know of that will have all of this information listed together. Several different research projects over 10 years years time went into the creation of the first Cream Legbar. Thanks to Historian David Schrivenger sending us some copies from his personal collection of historical documents published by the Auto-sexing Poultry Association of Great Britain in the 1940-50's, the achieves of publications from the Journal of Genetics, and some other books and pamphlets written by Punnett and Pease that we got through inter Library loans, the History Committee of the Cream Legbar Working Group (CLWG) was able to put most of the pieces of the puzzle together. Our full list of references will be listed on the club's breed history (which will be on our website for everyone to read). There were four relevant articles in the Journal of Genetics, three in the Auto-Sexing Poultry Association's publications, and a few publication from the interlibrary loans (Bulletin 38, Sex-links in Poultry, etc.)