The date of the first Naturalist is unknown and time of writing (June 2014) and currently we position it starting at 1900.
We have two items, one by H.E. Forrest from 1918, the other by (Miss) Frances Pitt from 1919.
1918 Forest, H.E. Bitterns in the West. Naturalist. 1 June 1918. p.203.
1918 Pitt, F. Pied Redwing. Naturalist. 1 Oct. 1918. pp.335.