- Natural History Museum, London: NHM WP1/4/5
- Wallace, W. G. & Wallace, V. (1916). Part IV. Home Life. 103-138. In: Marchant, J. (Ed.). Alfred Russel Wallace; Letters and Reminiscences. Vol. 2. London & New York: Cassell & Co. [p. 115]
Sending a box of plants, including Gentians, gathered at the Furka Pass, detailed instructions for planting in greenhouse, plans to put out on new rockery; Pa (Annie's father William Mitten) finding lots of curiosities including miniature willows; plans to go on to Grimsel Hospice and Meiringen.