This six book series was published by four different published.
R. Worthington/ Worthington Co. was one of those publishers. It published this series in two formats.
In 1882 R. Worthington published all six Harlie titles in a boxed set. They are cloth 16 mo. square with gold gilt lettering.
Later two Harlie books were part of this firm’s Franklin Series (1888). One was called the Harlie Stories and contained the French Flower, Harlie’s Letter and Friskie, The Pony. It also printed “Abbott’s Stories for Children” as part of the Franklin Series. The latter Harlie book included three Harlie titles: Wild Peggie, The New Shoes and The Sea Shore.