Harris suggested that I proof-read his Methods of Structural Linguistics, my introduction to the modern field, and take his graduate courses, then on discourse analysis. He also suggested that I take graduate courses with several outstanding figures at the university, among them Nelson Goodman (philosophy) and Nathan Fine (mathematics), which I also did. By then the enthusiasm had returned -- and in retrospect, I suspect that Harris, a remarkable person who had an enormous influence on a great many young people, was subtly inducing me to go on in college.
By 1948 I was also working on my own on an undergraduate thesis, a generative grammar of Modern Hebrew, mostly morphophonemics (revised 1951 version published in 1979). And then on from there.