PSSSST....I have only read through page one and something caught my eye...in this age of Anthrax, an anonymous letter might not be opened and would more likely be thrown out. At least put a return address, even if it is not yours, and use a good envelope. The mail people are used to getting mail from insurance companies, legal requests for release of records and pharmacutical companies-all have return addresses. An anonymous letter might not only not be taken seriously, but might not be opened.
Just a thought.