They were modelled from life in plaster and coated with a fine wax layer which was then coloured. Photographs of four figures by Agatha Walker of characters from 'The Beggar's Opera', exhibited at the Artificers' Guild are illustrated in The Studio Yearbook of Decorative Art 1922 (p.90). An exhibition of the figurines was held at the Fine Art Society in London in 1931. During the 1920s Walker made some of her figurines in clay. In the early 1930s, to widen the market for her figures beyond the stage, Walker produced a series of figurines of nursery rhyme figurines. She also began making figurines of notable historical and contemporary figures including Florence Nightingale and Queen Mary, some of which were shown at the Ruskin Gallery in Birmingham in 1932.

[The figurines made by Walker in the 1920s and 1930s are discussed in detail in Jordan, Christopher. ‘Intertwining lives. In search of Agatha Walker, sculptor and pottery figure artist’. Journal of the Decorative Art Society 1850 to the Present vol. 35, 2011 pp. 8-33]

Walker also designed a number of book-jackets. Her work as an illustrator included seven hand-coloured wood-cut illustrations for Margaret Holden's translation of Emile Guillaumin's The Life of a Simple Man (1923); and illustrations for books published by Oxford University Press including by Paladins of India by Sir George Dunbar's (1932); The Gladiators by George John Whyte-Melville (1933); Scaramouche by Rafael Sabatini (1933); and Phroso by Anthony Hope (1934).

Walker exhibited at the London Salon, Royal Academy, Society of Women Artists, and Royal Miniature Society in London; Royal West of England Academy in Bristol; Royal Scottish Academy in Edinburgh; and at the Walker Art Gallery in Sheffield. She was a member of the Arts & Crafts Exhibition Society.

In 1923 Walker and Durnford left Kensington and moved to Seven Acres, a recently build Arts & Crafts house near Long Crendon in rural Buckinghamshire. In 1935 they relocated to Stoney Down, a house near Corfe Mullen in Dorset. Walker died in Ringwood, Hampshire on 10 February 1980.

Several examples of Walker's figurines are in the permanent collection of the Victoria and Albert Museum in London. A larger collection consisting of at least 50 figures, mainly in plaster with some wax, of theatrical, religious and royal subjects and plaques related to religious subjects, and an archive have been acquired by Dorset Natural History and Archaeological Society. The collection is held at the Dorset County Museum.