Claim: British Pteridological Society (for fern enthusiasts of the British Isles) 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) 1908-1909 Alex Cowan (1863-1943) 1909-1920 William Bathgate Cranfield (1859-1948) 1920-1948 Robert Bolton (c.1869-1949) 1948-1949 Arthur Hugh Garfit Alston (1902-1958) 1949-1958 Thomas H. Bolton (1899-1972) 1958-1960 Richard Eric Holttum (1895-1900) 1960-1963 Reginald Kaye (1902-1992) 1963-1966 James Davidson (c.1896-1985) 1966-1969 Irene Manton (1904-1988) 1969-1972 Henry L. Schollick (1906-1991) 1972-1975 Stanley Walker (1924-1985) 1975-1979 James Wood Dyce (1905-1996) 1979-1982 Anthony Clive Jermy (1932-2014) 1982-1985 Gwladys Tonge (1920-2017) 1985-1988 Barry A. Thomas 1988-1991 Jack Henry Bouckley (1919-2013) 1991-1994 Trevor George Walker (1927-2006) 1994-1997 Martin H. Rickard 1997-2001 Alastair C. Wardlaw 2001-2004 Adrian F. Dyer 2004-2007 Robert W. Sykes 2007-2010 Mary Gibby 2010-2013 John A. Edgington 2013-2016 Fred Rumsey 2016-