Virgil Markham may be the same man as the son of Edwin Markham, the American 'Poet Laureate of the People' (1852-1940), who renewed copyright on his father's works in 1950.

Bibliography

Death in the Dusk (1928)

Shock! (1930) aka The Black Door

The Devil Drives (1932)

Song of Doom (1932) aka Red Warning

Inspector Rusby's Finale (1933)

The Dead Are Prowling (1934)

The Deadly Jest (1935)

Snatch (1936)