The Dead Man's Notebook

Found on the dead gentleman at the Devil's Rock Pile outside of Osage Mission, KS.
A small leather-bound journal written in ink in some sort of cypher. The writing is precise and uniform - like a draftsman might produce.
Contains the following very detailed diagrams and drawings, several span multiple pages.

1. Spider-motif cemetery gates
2. Brooklyn Bridge under construction
3. A dissection of a pregnant pig
4. Great Chicago Fire and the reconstruction afterwards. With details of Anderson’s European Hotel.
5. Drawing of a severed right hand. In the webbing between thumb and forefinger is the crude tattoo of the ace and jack of spades.
6. St. Alphonsus Liguori Catholic Church in St. Louis
7. Sauer Castle in Kansas City