What is "blue foxes"

Usage examples of "blue foxes".

During Herbert's period of unemployment the two of us committed two medium-sized burglaries of delicatessen stores and one big juicy one -- a furrier's: the spoils were three blue foxes, a sealskin, a Persian lamb muff, and a pretty, though not enormously valuable, pony coat.

My cousins said I handled the blue foxes as if they were Picassos and anyone could see I had no head for business.