Until his demise, the Rileys had been long-time residents of Riverside, a section of the town of Greenwich, Connecticut, the well-known community of the "rich and famous."
Riley's first and most famous play is Personal Appearance, a three-act comedy produced by the legendary Brock Pemberton of Tony Awards fame.
Return Engagement is a satire of the summer stock theatre and its plot concerns a pair of actors, previously married to each other but now divorced, whose acting parts mirror their real life.
For a change, Riley tackled the theme of murder in this melodramatic play: He declared that any humour in Time to Kill was unintentional.
Hubbard's cartoon "Abe Martin of Brown County" appeared in the Indianapolis News and countless other newspapers for three decades.
Riley's obituary in The New York Times, mentions the 1937 version of Kid Galahad (directed by Michael Curtiz and starring Bette Davis and Edward G. Robinson) among his screenplays, although his contribution to that script is not officially credited.
However, Riley is duly credited in the other film of Curtiz (co-directed by its producer, Herbert B. Leonard) released that same year: The Perfect Specimen.
On that screenplay, Riley collaborated with Albert Beich, Fritz Falkenstein, N. Brewster Morse and Norman Reilly Raine.
Riley shared screenwriting credits with Earl W. Baldwin and Lillie Hayward (the dialogue by Brown Holmes was uncredited).
The plot concerns an attractive office girl, played by Marion Davies, who masks her sex-appeal by wearing horn-rimmed glasses and dressing conservatively in order to discourage men's attentions.
Four years later, Riley collaborated with Ben Barzman and Louis Lantz on the script of another musical, Universal's You're a Lucky Fellow, Mr. Smith (1943).