moo,
I believe what helped the type, is that I did not stray too far from the Brahma family tree. The original pullet looked somewhat like a short, stout,primitive Brahma. Hence the idea. The most common school of thought has the Brahma origin as a cross of Cochin and Malay. You will also find Malay in the parent stock of Cornish as well. So what I did ,in essence, was accidently simulate the origin of Brahmas, using a shorter, stockier cousin. Plus, the luxery of having modern Brahmas to cross to helped immensely.