- Best remembered as Brandon, the more confident and charismatic of the two prep school killers in Alfred Hitchcock's Rope (1948).
- While some sources report that he died of a punctured lung, his death certificate gives his cause of death as cardiac arrest and acute peri-myocarditis.
- Longtime companion of Clement Brace.
- His paternal grandfather was the inventor of several machines used on the Panama Canal.
- Dall was his maternal grandfather's first name.
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