For starters please post a transcript, no one is going to waste time trying to understand hand writing,and secondly i do not think one can decrypt this without more info, i highly doubt it is a standard algorithm such as rsa, md5, cezaro, sha or others.
Died in 1999, what was his job, did his job have anything to do with cryptography, or did he just made up an algorithm on the spot, and what if the method he used to encrypt revolves around a book he had or a poem he learned, perhaps the letters represent page numbers and line numbers from the book, all i am saying is that i need more info on this person.
I am not going on a whiled goose chase!