[Restorer]

You might add that a prewar Texas cattleman's customers would have been almost entirely southern, as the cattle drives north hadn't started yet. The primary market outside of Texas for cattle in this period was New Orleans.

[Non-Sequitur]

New Orleans is in Louisiana (29.5% of families owned slaves) and the beef was no doubt transshipped to Mississippi (49.1% of families owned slaves) and Alabama (35% of families owned slaves) and Georgia (37.3% of families owned slaves) and perhaps on to South Carolina (45.5% of families owned slaves). So no, I don't see where they benefitted from slavery at all. </sarcasm>