Mrs K.L. Davidson, originally from England, donated many plant specimens from near the Hex River Pass (at the upper end of the Hex River Valley, Cape Colony) to the South African Museum in Cape Town during 1905. The next year she again sent "very interesting" botanical specimens from the Hex River Valley and from Matroosberg (a village and railway station near the upper end of the Valley), including many forms new to the Museum's collections. She seems to have been particularly interested in the genus Eriospermum (Fam. Liliaceae), of which she found at least eight species in the valley, some of which were not represented in the Cape Government Herbarium. She described and illustrated several of the species in her "Notes on eriospermums of the Hex River Valley", published in the Agricultural Journal of the Cape of Good Hope (1907, Vol. 31, pp. 175-177).
Mrs Davidson returned to England towards the end of September 1906. During the next few years she wrote six books on gardening, all of which were published in London: The unheated greenhouse (1907, 248p), Gardens, past and present (1908, 232p), The formal garden (1909, 53p), The water garden (1909, 54p), The rock garden (1909, 69p), and The garden booklets (1910, 6 vols, including several of the above).