If any person or persons shall, from and after the passing of this act, by force and violence, take and carry away, or cause to be taken or carried away, and shall, by fraud or false pretense, seduce, or cause to be seduced, or shall attempt so to take, carry away or seduce, any negro or mulatto, from any part or parts of this commonwealth, to any other place or places whatsoever, out of this commonwealth, with a design and intention of selling and disposing of, or of causing to be sold, or of keeping and detaining, or of causing to be kept and detained, such negro or mulatto, as a slave or servant for life, or for any term whatsoever, every such person or persons, his or their aiders or abettors, shall on conviction thereof, in any court of this commonwealth having competent jurisdiction, be deemed guilty of a felony.