Surpmil: thank you for the additional info on Mr. Palmer. It really is a thrill to attach an owner to a firearm. I imagine Mr. Palmer would have had a hard time locating 303 Britishin 1920's-1940's Los Angeles, which could explain it's immaculate bore and condition. Whatever the reason, he stored this rifle very well, and it's a beauty.
Thanks to all for the additional info, interest, and comments.