The National Broadcasting Company presents The Adventures of Sam Spade, Detective. Sam Spade, Detective, agency. this is Miss Bergamot. Oh, Miss Bergamot, I'm so sorry, but Mr. Spade isn't in. He ought to be back any moment, however. That is, if you wish to employ him. This is his secretary, Miss Perrine. Well, as a matter of fact, Miss Perrine. Oh, he'll be available, I know. The matter he's attending to is, it's just, it's purely routine. What he calls a, a humdrum number.…