Decryption of the "code" was being started from scratch. It had been determined the letter frequency was considerably different from letters written down randomly; the frequency was to be further tested to determine if the alcohol level of the writer could alter random distribution. The format of the code also appeared to follow the quatrain format of the "Rubaiyat, "supporting the theory that the code was a one-time pad encryption algorithm. Copies of the "Rubaiyat", as well as the Talmud and Bible, were being compared to the code using computers to get a statistical base for letter frequencies. However, the code's short length meant the investigators would require the exact edition of the book used. With the original copy lost in the 1950s, researchers have been looking for a FitzGerald edition without success.