The Yiddish ballad “A brivele der mamen” dates to more than a century ago, written during a time of uncertainty for many Jewish families who became separated; while some braved the journey to Ellis Island to build a new life in the United States, others stayed behind in Eastern European shtetls, awaiting good news and money from their loved ones overseas. In the song, a mother requests that her son, who recently immigrated to New York, write her a letter to let her know that he’s alive and well — “Nisht farges dayn mamen,” she pleads, “Don’t forget your mother.”...