sentences:  The beautiful young Laurel Hill asks Ellery Queen to investigate a series of unusual anonymous gifts that have been received by her father, Leander Hill, half of Hill and Priam, Wholesale Jewelers.Roger Priam is Leander's partner, who uses a wheelchair.The latest gift, a dead dog with a mysterious note in a silver casket around its neck, has caused Leander to have a heart attack and die.