My great great great grandparents and great great grand uncles were born in Mexico between the years of 1830 and 1842. I'm not exactly sure of their or their parents status in Mexico. At this point in my research I'm presuming that they were enslaved. The siblings took the surname of Henyard and after the Civil War relocated to Southern Mississippi. I'm looking for any families who may have resided in Mexico with that surname. If they were free people or not. The census lists their race in 1870 Wilkinson Co. Ms as black. However, they may have been mixed race.
Any assistance with the Mexican side of this puzzle would be greatly appreciated. Through my research on the area I did discover that there was quite a bit of back and forth travel for blacks at that time between Texas and Mexico. Also the borders changed as well and finally there was the UGRR which went into Mexico.
Please help, I don't even know where to begin to research Mexican records!
Thanks a bunch!