5949505 Portrait of Alexander J. Cassatt and His Son, Robert Kelso Cassatt, 1884 (oil on canvas) by Cassatt, Mary Stevenson (1844-1926); 100.3x81.3 cm; Philadelphia Museum of Art, Pennsylvania, PA, USA; (add.info.: Artist\'s brother, Alexander Johnston Cassatt (1839-1906) was the seventh president of the Pennsylvania Railroad (PRR), serving from June 9, 1899, to December 28, 1906.); by Philadelphia Museum of Art ; Purchased with the W. P. Wilstach Fund and with funds contributed by Mrs. William Coxe Wright.