Help With Understanding

"So please feel free to help with educating folks on; the complexities of subjective sensory perceptions, the importance of ambient lighting, the importance of developing a large reference collection, how to develop a good color eye, how to account for the aging of the paper and inks, and how to post all the digital imaging details needed to avoid misleading everyone with filtered and compressed images."

I feel this has some direction, please feel free to discuss here about the things mentioned.
I'm here to learn.

Could anyone help me with some specific plate details Or sources for them?
I'm looking into 1a,5 and 9.
The SG vol1 is great, but I need more!
"Repairs of the 1841 one penny plates 1-40" was extremely helpful but leaves me with a few curiosities still.