Whisper Of Theodorus
Warning This Section Does Contain Spoilers
The slip of paper has a cypher on that translates to the following website:
When we go to the home page of this website we are given a search box. Using the Latin word sent to us on the slip of paper of Incipere in the search field, it brings up a match to a file named "Incipere". Clicking on this brings us to a password screen. After some playing and manipulation, we find that incipere is the Latin word for "begin". Typing the word "Begin" into the password field we gain access.