 But American folklorist Richard M. Dorson found that O'Reilly invented the stories as "folklore", and that later writers either borrowed tales from O'Reilly, or added further adventures of their own invention to the cycle.Edward "Tex" O'Reilly co-authored a cartoon strip with cartoonist Jack A. Warren, also known as Alonzo Vincent Warren, between 1929 and 1938.When O'Reilly died in 1946, Warren began a strip titled "Pecos Pete".