Which things in the manuscript can be dated?

[-JKP-]

By the way, I agree with Helmut that the dating of the script won't help us much in terms of deciphering the text, but I have a personal and professional interest in fonts and typefaces, and in the process of searching for matches I get to read a lot of manuscripts (and find other things along the way), so I feel it is worth my while.

Reading is absolutely essential to collecting script samples. You have to be absolutely sure you are sampling the correct characters.