Contains literary manuscripts and correspondence, personal journals and family histories, and illustrations and charter maps of various southern Californian cities, all materials written and created throughout Herbert Harker's life. Manuscripts include materials such as Goldenrod (1972) and Turn Again Home (1974-1975), which both illustrate the cowboy/farmer lifestyle in Cardston, Canada. Herbert also worked on short stories for juvenile and adult audiences, and religious texts, topics varying from dragons (The Dragon Hunter) to Old Testament prophets (David). The collection includes Medicine Mountain, The Only Way to Die, Silence, A Place to Stand, It Must Have Been a Stranger, Chanticleer, and the Point of No Return. Many of his manuscripts were written at his home in southern California, but his earlier works were completed in Canada. His personal journals and family histories cover the span of his parentage and his posterity, including his parents' histories and his children's mementos. His journals were written over a range of years (1952-2009), and were written in various locations (California and Canada). Illustrations and charter maps cover various topics. The maps specifically correlate with the Santa Barbara area, and the illustrations deal primarily with cowboys, ranches and horses. Dated approximately 1902 to 2015.