Council of Heads of Australasian Herbaria
Probably Ada Elizabeth Armytage (1858-1939). Born in Balmoral, Vic., one of ten children, to a pastoralist Charles Henry Armytage (1824-1876), and Caroline Morrell nee Tuckwell. Ada probably collected MEL undated specimens (as 'Miss Armytage') at Pakenham. One of her relatives ('H.N. Armytage') also collected MEL specimens in Qld.
Ada did not marry and died in Melbourne in 1939 in her 81st year.
Two letters from Mueller to Ada survive, and two from Mueller to her mother.
Source: Maroske, Sara and Vaughan, Alison (2014) 'Ferdinand Mueller's female plant
collectors: a biographical register', Muelleria Vol.32 [consult for source references]