William Crawford Anderson MP 1917: George Wardle MP (代理) 1917–18: W. F. Purdy 1918–19: John McGurk 1919–20: William Harold Hutchinson 1920–21: Alexander
B. Purdy (编). Enduring Records. The Environmental and Cultural Heritage of Wetlands. Oxford: Oxbow Books. 2001: 277–286. ISBN 1-84217-048-1. Purdy, Barbara