Facing the prospect of a waning empire and no clear successor, Spanish agent Carmen Balcells, 83, announced last month that she had signed a letter of intent with the New York literary agent Andrew Wylie to form a new venture, the Balcells-Wylie agency. The outline of the deal remains unclear, and there is always a chance that Ms. Balcells could change her mind. The New York Times published this piece about her, the deal and the end of an era.















