The invitation from Edgar Pelican arrived at Dr. Clayton Niles' office, by courier. It was ivory-colored, gilt-edged, watermarked, scented with chicory and embossed with the Pelican family crest: two eagles devouring a duck. A certified check accompanied the summons, favoring Dr. Niles in the amount of one thousand dollars. Clayton settled his lean, six-foot frame in the swivel-chair behind his desk and studied the jagged signature on the draft. "An...