I have what I think is very close to a final query done. I also have a version of the synopsis that is too long (1,300 words) and probably too plodding, but at least accurately reflects the content of the book. There's a reason everyone hates writing synopses: if you've tightly woven your plot, it's hard to leave anything out. For example (and being very vague): in one climactic scene, Mary frees herself from a seemingly impossible situation using tools and information she got during an encounter with a minor character much earlier in the book. If I don't explain that she has these tools and information, her escape comes off as simplistic and dumb, but in order to explain I have to include this earlier, seemingly-insignificant encounter in the synopsis. Bleah. It's good enough for now.
Step Seven is to re-read all the character and worldbuilding work I did before I started the draft, and make any corrections so I have an accurate story Bible. I also need to make a firm timeline using the actual days of the week from 1851/1852. I've allotted two days for this.