Manuel was the only family member to stay in touch with his father,[6] who remarried in 1911 to Jennie Schafland (or Shefflen)[7] and had a daughter, Adella Rosenberg Strauss (1912–2006).

[12] He enlisted in the navy on June 5, 1918, and became the official cartoonist of the United States aviation training department in Great Lakes, Illinois.

[13] During his thirteen years as the chief artist of the Scripps-Howard newspapers from 1917 to 1930, Rosenberg carried his drawing board to every corner of the world to cover the major news stories.

[9] He interviewed and sketched almost every famous personality of his time, including statesmen, soldiers, chorus girls and even criminals[14]—including bootlegger George Remus in his 1927 murder trial.

He sketched and interviewed Galli-Curci, Lindbergh, Grand Duke Alexander, Llyod George, Queen Maria of Romania, and Lord Rothschild.

[12] As a journalist and art editor, Rosenberg spent practically all his time “on the road.”[21] He chronicled foreign travel assignments to over thirty countries for the Cincinnati Post, starting with his 1922 and 1926 trips to Europe.

In 1973, Lydie donated 300 of Manuel Rosenberg’s sketches and caricatures of leading personalities in public life and the arts as well as travel drawings made from the 1920s to the 1950s to the Rare Library Archives of Columbia University.