D. Lothrop and Company published the Rollo set in two different formats. The earlier format has the identical cover of the later John Anderson book. In addition this Lothrop book has the Anderson logo on the base of the spine.

The later Lothrop cover is the same as the DeWolfe, Fiske and Company cover. There are no dates in the Lothrop books but the ads in the back of the book are John Anderson ads. This most likely means that Anderson rented the plates out to Lothrop. In 1885 DeWolfe, Fiske and Company made arrangements with the Anderson School-Book Company to publish their entire line of books, including the Rollo books (Publishers' Weekly, 1885).

Earlier-ca. 1883	Later-ca. 1884