Born in New York City. Attended New York University. Married Martha Agnes Clinton January 10, 1910. They had three children. Employed with Lincoln National Bank after 1901; with National Bank of Commerce 1908 to 1930. President of Seekunk Lace Company 1930 to 1951. He died in New York City.

Stack had a long term business relationship with the firm of Stack's. There was no family relationship. Coins from the Stack collection were included in sales conducted by Stack's March 13, 1975, and by Bowers and Ruddy April 23, 1979. More sales were conducted by Stack’s November 29, 1989, January 16, 1990, March 15, 1990, and October 19-20, 1994.

His 1894-S dime bought at the 1947 H. R. Lee collection sale was sold at auction by Stack's January 16-18, 1990. It realized $275,000. The paper money collection was sold at auction by Stack's March 15, 1990. Many pieces had been bought from the Grinnell collection.

bio: NCAB 37 (photo) obit: NYT 2/9/51