He graduated from Washington & Jefferson College in 1933 and from Temple University's medical school in 1938 and married a nurse, Sarah Luddy.
[2] Allen Saunders was chair at the time of the local mental hygiene center that invited him there, and in his autobiography, he recalled that Dallis approached him, as a well-known comics writer (Steve Roper and Mike Nomad, Mary Worth), about "his desire to write a comic strip, one tracing the history of medicine.
Later, he found himself working more with troubled youth in juvenile court, and from his experiences there, he conceived a second strip focused on the legal world, Judge Parker, which took off in 1952 and also became successful.
And yet they differed from Mary Worth in centering on male protagonists who counseled their clients with professional advice as well as intervening to help them with personal problems.
He was later remembered by his successor on two of his strips, Woody Wilson, as "a prince among men... educated, kindly, compassionate, talented and generous.