A neat letter showed up in a pile of Apple II docs I was sorting. It's is a letter thanking someone for having attended the independent developer conference in April 1983.
I looked into the conference just out of sheer curiosity, and found several references to a 1983 independent developer conference, but, that one happened in August 1983, several months after this letter. I can find no refernece to a conference earlier in the year.
If someone wants me to scan the whole thing let me know and I'll pop it out of the frame I have it in.