| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? |
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| Friendly animal story book | | 1927 | Illustrator | |  | |  | |
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| Modern-school arithmetic. 3d, 6th grades. By John R. Clark . . . Arthur S. Otis . . . and Caroline Hatton . . . with illustrations by Florence J. Hoopes and Margaret C. Hoopes. Yonkers-on-Hudson, N. Y., World book company, 1929. | | 1929 | Illustrator |  | |  | | |
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| Modern-school arithmetic ... ,4th and 5th grades] By John R. Clark ... Arthur 8. Otis ... and Caroline Hatton, with illustrations by Florence J. Hoopes and Margaret C. Hoopes. Yonkers-on-Hudson, N. Y., World book company, 1929. | | 1929 | Illustrator | | | | | |
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| Modern-school arithmetic. Eighth grade. By John R. Clark . . . Arthur S. Otis . . . and Caroline Hatton . . . illustrated by Margaret C. Hoopes. Yonkers-on-Hudson, N. Y., World book company, 1930. | | 1930 | Illustrator | | | | | |
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Public Domain Books