Born in Shakopee, Minnesota. Moved to Davenport, Iowa, in 1876. Married Pauline Mausnest in 1912. His first job was in the old Nicollet Hotel in Minneapolis.
Editor of "Inquiry Department Notes." At the 1921 ANA convention he exhibited a large selection of paper money. He served on the ANA board in 1920, chairman of the committee of papers and Chairman of the Board in 1926. He served as ANA President August 25, 1927, to August 28, 1930.
He assembled a collection of fractional currency and United States paper money. Later he collected territorial gold. His collection was consigned for sale by M. H. Bolender November 24, 1936, and two sales in 1937.
Markus had been in failing health but was determined to attend the 1936 ANA convention in Minneapolis. He had attended every convention since 1916. On Monday morning he suffered a heart attack in the lobby of the new Nicollet Hotel. He died the following morning. He had been life member number 6 in the ANA.
profile: NUM 40 Nov 1927 page 695 (photo)
bio: NUM 79 Jun 1966 papes 725-727
obit: NUM 49 Oct 1936 page 813 (photo)Source credit: Pete Smith, American Numismatic Biographies