Rosamund was born in June 1885 on the Bach-y-graig Estate,[3] St Asaph, Denbighshire, Wales,[4] the daughter of Edward Pemeberton Salusbury Esq and Julia Melville Smith.

She competed at the 1910 Wimbledon Championships where she lost in the second round to Winifred McNair,[6] and at the 1911 Wimbledon Championships where she reached the third round, but was beaten by Marie Hazel.

[11] She was the daughter of Edward Pemeberton Salusbury Esq (born 2 November 1854), Captain and Hon.

[14] Their second child was Edward Clare Frederick Salusbury (born 10 May 1886) her brother.

[16] She married Charles Frederick Colman, in September 1912 in St Asaph, Denbighshire.