My pleasure!
-Art-
I really like the noise filter effect on the start and would really think of using it for other scene and backstory elements (I notice is remove in most recent one, which is natural to be able to present more detail). Do keep it in your tool set for specific moments as I think it adds a nice detail.
I love the attention to detail you have to make it as close to the time period as possible. Amazing outfit design, great background and we can tell you research this really well.
Your line is really clean and your colors are amazing. They feel natural and is easy to distinguish background from characters. You make amazing shadows by the way, but characters rarely have their shadow being cast to the floor or walls which sometimes make them feel like they are floating. That is about all I could fine though. Recap is that you art is amazing, great lines, great design and outfits, amazing colors and really good amount of different perspectives.
-Writing-
I notice a few amount of typos as I read (one of the most noticeable one is thombstone, which I am guessing should read tombstone? I try searching to see if thombstone had some significance during that time period but nothing came up). Outside of that you have a good font usage, nice amount of text and great 'sound effects'.
-Paneling-
Not much to say here, you have a really good amount of panels and good spacing, sometimes they feel a bit to close to one another, but other than that I believe they are great and flow perfectly.
-Story-
I got to say your story is really good! It has mystery all around it keeping one guessing on events and what will happen as well as question things. You slowly ease us into the world and slowly placing all the elements in their place instead of bombarding everything from the start!
I love the interaction of the characters giving them life and of course making the plot even better. I can't wait to see what else the mirror reveals and all the dark past secrets of everyone involve!
You have a really great comic! Great art, excellent story and good narrative! I for one am looking forward to even more of it!
I did notice a lot of message about your health, I hope you do take care of yourself and don't overwork! Your health is the most important thing