The Principal campaigners against Sati were Christian and Hindu reformers such as William Carey and Ram Mohan Roy. In 1799 Carey, a Baptist missionary from England, first witnessed the burning of a widow on her husband's funeral pyre. Horrified by the practice, Carey and his coworkers Joshua Marshman and William Ward opposed "sati" from that point onward, lobbying for its abolishment. Known as the Serampore Trio, they published essays forcefully condemning the practice and presented an address against Sati to then Governor General of India, Lord Wellesley.