Which one you wish, senor? Teodoro Trinfan, rope in hand, stood there ready to cast for one of the milling colts.
Teodoro would only sell the man one of his brown colts. 
mnli hypothesis: Teodoro would only sell the man one of his brown colts.  premise: Which one you wish, senor? Teodoro Trinfan, rope in hand, stood there ready to cast for one of the milling colts.