Thanks for sharing. I went through a similar process recently, manually stitching together fire insurance maps from my hometown. A large part of the business district burned down in 1916, but maps from a couple of years earlier survived. It worked, but it was tedious. This would have saved a lot of time. Here's the link if anyone wants to check it out: https://fire.gorch.com/
Became more fascinated with the history of my small hometown (Paris, Texas) TLDR: Much of it was wiped out by a 1916 fire. I spent some time recently vibe-coding this interactive map to provide some kind of historic visualization ( which enabled me to see the impact better )
https://gorch.com/parisfiremap/
For fun I stitched together a map of my hometown from older fire insurance maps ( taken in 1914 ) Ironically much of the downtown area was destroyed by a fire two years later.