Although active as a composer and private instructor in the years following 1912, Bauer ultimately undertook two more periods of study in Europe, partially facilitated by financial inheritances upon the deaths her mother and older brother. In 1914, she once again returned to Berlin to study with Ertel, but her time there was curtailed by the outbreak of World War I. Almost ten years later, Bauer decided once again to undertake an extended period of study in Europe, this time at the Paris Conservatory with André Gedalge, who had also taught composers such as Maurice Ravel, Darius Milhaud, and Arthur Honegger. At the time, she was 40 years old and offered the following reason for continuing her studies comparatively late in life: “As a member of the American Music Guild, I had the opportunity to measure my powers and my limitations with those of my colleagues...The result was a period of study in Europe. This time I decided in Paris I would find the kind of work and musical environment for which I was seeking.” Bauer's studies at the Paris Conservatory, however, were cut short in 1926 when she received the news that her sister Emilie had been hit by a car. Bauer returned to New York, but Emilie's injuries ultimately proved fatal.