Hello, and welcome FV, it's good to have you here! I will answer your post in length once it's moved here, until then I feel that I could link you to the blog that this thread is about (unless you've found that as well!) http://ancientandold.blogspot.com/
About the hippodrome horti, I'm happy that you notice my question on it (I wish that someone would a long time ago ), but I have figured out what it was since I uploaded that shot too, the pictures in that album are about 3 years old. Thanks!