'P' is the key

[pjburkshire]

A few days ago I decided to dive into the Voynich, just as a curiosity. That was when I realized that by viewing the image on the left-hand side of p.67 as a proto-clock, you can (without stretching) arrive at the conclusion that there was a very short ~3.5 hour difference between sunrise and sunset. In my original post, I included calculations for 3-5 hours for safe margin- all of which leave you somewhere in the Arctic Circle. 

I don't understand how you are reading this proto-clock to get times for sunrise and sunset.