Update: Going to his website, here is Roger Tréfousse's tribute to his teacher, Fantasy on the name Ben Weber
This advice on composing, from the memoir linked to above is rather intriguing:
Ben emphasized the value of finding ways of encouraging your unconscious mind to lead your thinking and, with luck, take you to places where you might never have consciously planned to go. For example, he suggested beginning work on a piece by writing a list of words—not poems, just words. Adjectives were his choice. He said he often used this technique to get his creative thoughts flowing. To illustrate, he chose two words, “peripatetic” and “voluptuous,” and wrote a line of music inspired by each word.