Born in Sydney in 1838, Rebecca was the eldest daughter of English-born landscape painter Conrad Martens. A painter and sketcher herself, she studied under her father’s tuition, often mimicking his style in her landscapes or seascapes of Sydney. She exhibited sporadically with the NSW Academy of Art in the 1870s and with the Art Society of NSW in the 1880s, and enjoyed mildly favourable reviews. Mostly she painted Sydney seascapes or landscapes in watercolour, occasionally in oils, but she also did plant studies, sketches of the family home, Rockleigh Grange at St Leonards, and other Sydney houses, views in the Bathurst and Lithgow areas, and copies of Conrad Martens’s Beagle drawings. Active between 1851 and about 1890, she died on 9 July 1909 at Rockleigh Grange.