On her death, longtime acquaintance Frederick Tatham took possession of Blake's works and continued selling them. Tatham later joined the fundamentalist Irvingite church and under the influence of conservative members of that church burned manuscripts that he deemed heretical. The exact number of destroyed manuscripts is unknown, but shortly before his death Blake told a friend he had written "twenty tragedies as long as "Macbeth"", none of which survive. Another acquaintance, William Michael Rossetti, also burned works by Blake that he considered lacking in quality, and John Linnell erased sexual imagery from a number of Blake's drawings. At the same time, some works not intended for publication were preserved by friends, such as his notebook and "An Island in the Moon".