Artist Andrew Wyeth, who portrayed the hidden melancholy of the people and landscapes of Pennsylvania's Brandywine Valley, and coastal Maine in works such as Christina's World, died early Jan. 16. He was 91.

The son of famed painter and book illustrator N.C. Wyeth, Andrew Wyeth gained wealth, acclaim and tremendous popularity on his own. But he chafed under criticism from some experts who regarded him as a facile realist, not an artist but merely an illustrator.

It was in Maine that Wyeth found the subject for Christina's World, his best-known painting. And it was in Pennsylvania that he met Helga Testorf, a German-born neighbor in his native Chadds Ford who became the subject of the intimate portraits that brought him millions of dollars, and a wave of public attention in 1986.