In African Forest and Jungle

The Land of the Long Night

Lost in the Jungle; Narrated for Young People

The Country of the Dwarfs

Stories of the Gorilla Country, Narrated for Young People

The Viking Age. Volume 1 (of 2) The early history, manners, and customs of the ancestors of the English-speaking nations

The Viking Age. Volume 2 (of 2) The early history, manners, and customs of the ancestors of the English-speaking nations

Ivar the Viking A romantic history based upon authentic facts of the third and fourth centuries

King Mombo

Wild life under the equator

The world of the great forest