Walker Evans reportedly ate there in the early '40s, and so did martyred Reds Julius and Ethel Rosenberg. Berenice Abbott lived in an apartment above it for 30 years, and presumably ate there too. What would they have eaten? An old Blue Mill menu lists such classic American fare as fried chicken, potted beef, and liver and onions, along with Portuguese specialties like caldo verde and frango a mamarrosa. But while Craig Claiborne praised the ambience and service in a 1960s New York Times dining guide, he found the food "undistinguished but palatable." continued...