While working as a teacher, Perceval continued with his commercial illustrating work, creating a prized and memorable series of travel posters extolling the virtues of the Southwest for the
Santa Fe Railway. Perceval's passion for the Southwest led him to live with the
Hopi in 1952 and in
Tucson, Arizona from 1954 to 1959. Perceval's ongoing commitment to historical accuracy further enhanced his reputation as a sought-after illustrator. "To be of value," he wrote, "illustrations must be historically accurate; otherwise periods tend to merge into a conglomerate mass, thereby defeating the entire purpose of history teaching."
Perceval illustrated numerous books including Charles Loomis'
General Crook and the Apache Wars (1966),
Leo Carrillo's
The California I Love (1962) and his own
A Navajo Sketchbook (1962). Perceval also wrote extensively about cattle and horse brands, viewing brands as a unique art form and tracing their origins back to ancient times. In total, Perceval illustrated more than 50 books featuring his beloved Western themes. Later in his career, Perceval was an active member of the Los Angeles Corral of Westerners where, after joining in 1947, he shared his expertise in Western history and illustration. == Later life, death and legacy ==