[3][4] After her polytechnic training, Daff worked as an illustrator for Christmas card producer Raphael Tuck & Sons.

[5]: 117  Having left London on the Esperance Bay, Daff arrived in Wellington in 1926[6] and obtained work with the Government Publicity Department.

[3] She took on the role of Officer in Charge of Exhibitions at Otago Museum, painting dioramas, reorganising and decorating the galleries, designing displays, posters, and producing guide-books.

[3] Her copies of drawings by J W Barnicoat are in the Hocken Collections, as are a painting of a takahe and other unfinished natural history studies.

Daff also supplied hundreds of line drawings to illustrate research publications on ethnography, many of which can be seen online in the Journal of the Polynesian Society.