 She was involved in the 1904–1905 Welsh Revival, one of the largest Christian revivals ever to break out, although the revival was abruptly shortened with the mental and physical collapse of one of the leaders, Evan Roberts.Penn-Lewis travelled internationally to take her message to audiences in Russia, Scandinavia, Canada, the U.S., and India.Penn-Lewis was close to Evan Roberts and there is some controversy associated with her influence over him.