Now here's where I get confused. A couple of sources I'm looking at to write this post note he moved to New York City in 1922. Logic would say Class of 1923 meant he was still at the school until that graduating year. His father died in 1922.
Roughly in this 1922-24 time period, Bob also took on the famed "riches to rags" descent to become a worker on a Standard Oil tanker. In September of 1924, he would act in his first play, The Mask and the Face.
If I did my math correctly, Bob is around 19 in the below class photo. Can you pick him out?
Many thanks to "CM Staff Researcher" Tracy for digging this up. Of course, I have no real staff (or payroll for that matter), but the title sure looks good!