Claim: British Pteridological Society has had five presidents between 1892 and 2016, one of which was Irene Manton
Evidence: Frederick Wilson Stansfield (1854-1937) 1892-1897, 1902-1904, 1907-1908 Charles Thomas Druery (1843-1917) 1898-1901 William Henry Phillips (1830-1923) 1904-1907 James J. Smithies (c.1850-1931) Alex Cowan (1863-1943) 1909-1920 1908-1909 Fred Rumsey 2016- William Bathgate Cranfield (1859-1948) 1920-1948