According to legend, the Margoshes family was descended from Spanish exiles who went to Poland in the late 15th century.
He initially worked as an agent and traveling businessman for the New York Yiddish newspapers.
[2] Margoshes worked as a writer for the Tageblatt from 1901 to 1914, Der Tog from 1914 to 1921, and the Jewish Morning Journal from 1921 to 1954.
Over the years, he published a large number of a series of articles on historical and folkloric topics.
He complied the first full bibliography of New York's Yiddish press and published a number of essays on the history of Jewish journalism.
In 1936, he published a memoir, Derinerungen fun mayn Lebn (Experiences from my Life).