Analysis of information sources in references of the Wikipedia article "John Dall" in English language version.
Dall, John ... Death Date 01/15/71 ... Age 50 yrs
Suicide. Pistol shot.(registration required)
John Dall Thompson ... Birth Year (Estimated): 1920
Worthington Thompson... is the only immediate survivor of John Dall... [who] died Friday in his Hollywood home of a heart attack. Mr. Thompson said today that his brother had never fully recovered from a fall last October in London. The 50-year-old actor was in Europe on business at the time... His grandfather was the late Dall Worthington of Baltimore County.
John Dall Thompson – he used the middle name for his career as an actor...
Dall, John ... Death Date 01/15/71 ... Age 50 yrs