Complex sentence: Ehrich Galleries remained open after Ehrich's death in 1911, helmed by his sons Harold and Walter Ehrich, who donated some of its holdings to the Yale University Art Gallery in memory of their father.
Split into simpler sentences: Ehrich Galleries remained open after Ehrich's death in 1911. Ownership passed to his his sons, Harold and Walter Ehrich, who donated some of its holdings to the Yale University Art Gallery in memory of their father.