Following his stint at George Washington University, he embarked on international ethnological expeditions to the Caribbean and then to Puerto Rico.

Returning to the United States in 1933, Mr. Hubbard launched his literary career. His work spanned all genres, and between 1934 and 1950, he was to author more than 200 novels, stories and screenplays.

Mr. Hubbard’s literary career was his means to continue his research into what he now spoke of in terms of the “common denominator of life.” In the late 1930s, he conducted experiments concerning cellular memory retention and memory transmission to later generations, concluding that some unknown factor was capable of recording and transmitting the memory of a single event from one cellular generation to the next.