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The Underground Railroad to Mexico. Across Texas and parts of Louisiana, scholars are working to piece together a puzzle of a largely forgotten piece of American history: a network that helped thousands of Black slaves escape to south of the border. apnews.com/d26243702f11e2…
This was a deeply personal story to research and write. During my reporting, I found out that my great grandfather’s mother was born in Monclova, Mexico. That was a stop on the Underground Railroad to Mexico. Her name was Francisca Martinez 
My great grandfather Florencio Contreras come to the US from Mexico in the early 1900s. Here's US Census form from 1910 where he is listed as a boarder. The Census taker classified him as a "mulatto" under race
