All right! I've finished the Epistle to Pythoklēs!
I'll re-iterate for everyone that I'm finding tremendous value in this practice. Beyond advancing my understand of ancient Greek, this has really been a great exercise to try to get inside of Epicurus' head and understand, not simply his conclusions and doctrines, but his way of thinking and explaining.
His analogical reasoning relies on simple, personal observations that we all make (such as the correspondence between thunder and stomach aches, discharge of lightning and diarrhea). I was refreshed to discover how many anatomical words he uses to describe the features of nature.
From Pythoklēs, I have learned that the value of Epicurean geoscience, meteorology, and astronomy has less to do with his impressive, scientific foresight, and much more to do with its function as a Ethical tool to reduce anxiety. With Heródotos, I anticipate finding more accuracy with cosmology.