After Pearl married her second husband, Richard Walsh, the couple adopted six children. In 1949, Pearl, along with colleagues, started an adoption agency focused on helping mixed-raced children in Asia. The agency was named Welcome House. Pearl also founded another sponsorship agency, the Pearl S. Buck Foundation, which later became called Opportunity House. Pearl decided to hand over the majority of her earnings from Opportunity House, adding up to over $7 million. In 1991, Welcome House and Opportunity House merged together to become Pearl S. Buck International.