Quemado?

On the Rio Grande about halfway between Eagle Pass and Del Rio, along a regularly travelled highway between those places. Bunch of feedlots and IIRC pecan orchards there. Quemado itself not really remote, miles of river upstream and downstream less inhabited.

I’m guessing those kids were left where they would be found. A Coyote with a conscience?

"...if the gentlemen of Virginia shall send us a dozen of their sons, we would take great care in their education, instruct them in all we know, and make men of them." Canasatego 1744