After brief stints with newspapers in Savannah, Georgia and Richmond, Virginia, he returned to DC and joined the Washington bureau of the Chicago Record-Herald.

His protagonist, Ralph Dolan, works his way up through the newspaper trade, then switches to the business of public relations and lobbying, ending as the top lobbyist of a large industry association.

Virtually in parallel with Capitol Hill, Fergusson wrote The Blood of the Conquerors, the first of his historical novels set in New Mexico.

His two novels of the 1930s dealt with contemporary themes, and Fergusson also published two works of non-fiction, Rio Grande and Modern Man: His Beliefs and Behavior.

His last two novels, Grant of Kingdom and The Conquest of Don Pedro, dealt with earlier periods in the history of New Mexico.