We're saluting Dashiell Hammett - born May 27, 1894 - with three old time radio adventures of his famous private eye Sam Spade. Spade's adventures made for one of the best radio detective shows of the era - a hard-boiled mystery that poked gentle fun at the conventions of the genre. Howard Duff stars as the gumshoe in "The Wheel of Life Caper" (originally aired on CBS on July 11, 19498) and "The Battles of Belvedere" (AFRS rebroadcast from May 1, 1949). Then Steven Dunne stars as Spade in "The Spanish Prisoner Caper" (originally aired on NBC on