From a email 4/28/2011:
I believe in one of Groucho's autobiographical books it indicates that his grandfather lived to be 100 which would imply a death date of 1923 or so; I also remember perhaps that he said he died in 1919. I am sorry I do not have the exact details or which of the autobios this was mentioned in, but definitely it was said that Schonberg lived to an advanced age.
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In his book "Harpo Speaks" Harpo relates that his grandfather died in 1919 at the age of 100.Bio by M. Aumen (48411830).
From a email 4/28/2011:
I believe in one of Groucho's autobiographical books it indicates that his grandfather lived to be 100 which would imply a death date of 1923 or so; I also remember perhaps that he said he died in 1919. I am sorry I do not have the exact details or which of the autobios this was mentioned in, but definitely it was said that Schonberg lived to an advanced age.
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In his book "Harpo Speaks" Harpo relates that his grandfather died in 1919 at the age of 100.Bio by M. Aumen (48411830).