Plot hole: Jamiel delivers Ali Baba's ransom note to Hulagu Khan by throwing a knife, and the shocked Khan and his guards look to the window. Since Jamiel does not duck away immediately, he should have been seen and identified immediately, but nothing of that sort happens.
Plot hole: After The Pie runs away and breaks the delivery cart, Velvet jumps on Miss Ada (the family's cart horse) to chase after him. It seems very convenient that Miss Ada, whose only job is to pull the cart, is standing untied in the yard wearing a riding bridle, just waiting for Velvet to jump on.
Plot hole: Vic Gordon finds the Black Whip's clothes and puts them on. Then he goes to rescue Barbara Meredith (the real Black Whip). Strangely, her outfit fits him perfectly. In other scenes, he is taller and more muscular than she is. Did she keep several sets of clothes in various sizes, including boots?