"Miss Columbias"

Permission Granted by Copyright Owner for Use on Book Drum1925 "Mercury" dime - Credit: www.CoinPage.com
This is probably an offhand and erroneous reference to the Miss Liberty, the goddess that adorned the dime until Franklin Roosevelt became the “heads” on the U.S. ten-cent piece in 1946. Through most of the 19th century, the figure on a dime was obviously a seated goddess, but between 1916 and 1945, the design showed a profile with a winged head, often mistaken for the Roman god Mercury and commonly known as "Mercury dimes." But the head was still Miss Liberty.

A Columbia figure once appeared on a colonial coin (“Columbia” being a poetic feminine personification of the European colonies in North America), but that was back in the 16th or 17th century.