Bonsall was a student of Howard Pyle and Thomas Eakins and member of The Plastic Club in the United States.
[6] She studied under Howard Pyle and Thomas Eakins at the Pennsylvania Academy of the Fine Arts,[11] beginning on a scholarship in 1894.
[11] When its fall exhibition was held in 1898, her work and that of other of Pyle's former students—such as Elizabeth Shippen Green, Jessie Willcox Smith, Charlotte Harding, Violet Oakley, and Angela De Cora—were singled out.
[19] In 1904, The Book of the Dog was published with her full-page colored illustrations of Alice Calhoun Haines' stories and verses.
Elizabeth Shippen Green and Jessie Willcox Smith's illustration of The Child was also sold in both publications that year.
[24] She illustrated a book for the School for the Deaf entitled Stories in Prose and Rhyme and Nature Lessons for Little Children that was published in 1912.
[18] The book is the story of the rat-infested town of Hamelin, Germany and the pied piper who lures rodents to the river to drown with the sound of his music.
[30] The Delaware Art Museum states of her illustrations, "Bonsall's vivid brushstroke suggests the frenetic scramble at the sound of the piper.
"[30][18] Papers about her career, including exhibition catalogs, artist's statements, publications, brochures, and reviews are held at the Smithsonian Libraries.