When he returned home in 1785, Franklin occupied a position second only to that of George Washington as the champion of American independence. He returned from France with an unexplained shortage of 100,000 pounds in Congressional funds. In response to a question from a member of Congress about this, Franklin, quoting the Bible, quipped, "Muzzle not the ox that treadeth out his master's grain." The missing funds were never again mentioned in Congress. Le Ray honored him with a commissioned portrait painted by Joseph Duplessis, which now hangs in the National Portrait Gallery of the Smithsonian Institution in Washington, D.C. After his return, Franklin became an abolitionist and freed his two slaves. He eventually became president of the Pennsylvania Abolition Society.