Slave steamship.
 

A 19th C Mexican steamship - slaver has been uncovered: https://www.smithsonianmag.com/smart...g0MjA1NTAyMAS2

She shipped captive Mayans to Cuba.

Mexico had no slavery. There was "Caciquismo", but no slavery. The Conquest killed almost 60% of the population, so all modern Mexicans are "Mestizos", to a greater or lesser degree, Mexican and Spanish.
Rgds.
Dave