London-born painter King exhibited at NAG in November of 1897 with her Sketch, St Erth, and a painting - Summer - in July 1898. Her return addresses, in notes to Henry Meynell RHEAM (acting as Secretary to the NSA and therefore Sales manager for the exhibitions), indicate that she was living at Bay View House, West Pentire Nr Newquay in 1898, and visited at Primrose Cottage, St Erth in September of that same year. Her correspondence concerns prices of her paintings and notifications for re-hangs at the gallery.
She also signed the Glanville letter from artists protesting against impending re-developments in St Ives in November 1898, and Whybrow notes her presence in the St Ives colony, indicated by one title being Fishing Boats, St Ives. (This may be the same artist, listed as Miss B KING, living in Bristol and exhibiting at the RBA in 1902.)
Wood further notes a Miss Bertha KING exhibiting a painting of wild parsley at the RA in 1900 from an address in Shoreham, Kent. She is also found exhibiting from Sevenoaks nearby that same year, and from Redlands, Bristol in 1901 at the RBA. By 1911 she was married and living in the E Transvaal, South Africa. In 1921, her exhibiting address was in Harpington, Herts, exhibiting at the RA twice and the Goupil Gallery at least once in the name of Bertha EVERARD.