f116v is a decryption attempt?

[ololololo]

N is the fourteenth letter of the Latin alphabet

13th. No J.

Forgot... Apologize.
But this fact can tell us more about the decipherer's supposed alphabet. It may have contained the letter J. This suggests that the author of the annotations likely lived in the 16th century.
But it's debatable...

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13th. No J.

Was K always included in the alphabetical order?

As far as I remember, in the early period, it could stand after H. Then it was used more often than we can see in the later versions of the Latin that has survived to us.