LONDON.- Sotheby’s announced that the Spanish section of the 19th Century European Paintings sale on 23 November will be headed by two outstanding oil paintings by Joaquín Sorolla (1863-1923). Depicting children by the sea, both works were painted over the same summer of 1904 on Cabañal beach, Valencia, a favourite location of the painter. Both works featured in Sorolla’s first major international exhibition of his work at Galerie Georges Petit in Paris in 1906, and have remained in two private collections for more than a century. El Pescador is dominated by the striking profile of a boy carrying a basket of fish as he walks along the shore. Behind him, in the distance, a group of younger children frolic in the sea. In Niños en la Playa two young boys sprawl at the water’s edge as they concentrate their attention on a toy sailing boat. Both scenes are bathed in the warmth of the Valencian sun. The bright Medite