Over the years, Lewis brought a series of lawsuits, generally unsuccessful, to challenge what he saw as violations of the separation of church and state. He publicized these suits in the pages of the Freethinkers of America's successive bulletins. He also challenged notable faith healers. Some of his other initiatives proved successful. He raised funds to erect statues of Thomas Paine in Morristown, New Jersey; Paine's birthplace at Thetford, England; and Paris, France. He placed a bust of Paine in New York University's Hall of Fame, though he was unable to place a bust of Ingersoll there. His agitation was at least partly responsible for the issuing (in 1968) of a U.S. postage stamp honoring Paine. (He walked out of its unveiling ceremony in Philadelphia after a prayer was said.) In 1954, he orchestrated the second restoration of the birthplace of nineteenth-century agnostic orator Robert Green Ingersoll; a freethought museum operated at the Dresden, New York, site for several years thereafter.