Course I asked you. I follow your writings a lot and learn from them. You don't give yourself enough credit. Even when you are asking questions, they are intelligent and spur conversation that I learn from. Go and ask Kathy then. She has a great rep for her knowledge in the breed. Who better to ask than someone who has recreated it and needed to know all the nuances of the breed to accomplish this successfully. Also, check the old lit in Google Books and archive.org . Once, Delaware were the big thing. At a time when many people were writing about poultry raising. Probably a lot there. Chin up, I have the same problem with Light Sussex. Very little modern info on them and very few (less than 4) other breeds with the same genotype based on eWh which I can study by comparison. Columbian Marans (based on Light Sussex cross, much less advanced than Sussex fowl); Black Tailed Jap Bantams from EU ( but have white neck, so not sure how much help there; Delawares, a barred Light Sussex genotype.
Best,
Karen
Ah, see your problem now, it's a timeline issue. They were created in 1940. The public domain lit stops in 1926. Then approved by APA in 1952 and out of favor by early 1960's. 'Pics of Kathy's birds:
http://flock-u.org/forum/viewtopic.php?f=28&t=1129&start=20