Million-Dollar Suitcase, The by Alice MacGowan (1858 - 1947)

Private detective Jerry Boyne is hot on the heels of a bank teller who has just embezzled nearly a million dollars in a suitcase. Cornered in his seventh-story apartment, the thief seems to vanish into thin air. Boyne continues the chase, aided by Barbara Wallace, a young women with observational and deductive powers that put Sherlock Holmes to shame. - Summary by Mark Nelson