Done!
I am pleased to report that I underestimated the score which could be squeezed from this game. Drumroll please...
I have a 2050AD Histographic win with a score of
64,296.
I think that's finally a new high - Aeson may have to start playing a HOF game again

I don't expect it will remain unbeaten for long. Nonetheless I'm quite happy with the game and with the score.
Final status:
Details
From 1796AD to 2050AD the game was uneventful.
Cleopatra remained quiet in Padded Cell.
I finished my last land adjustments in 1842AD. Finished rushing improvements (aqueducts, harbors, marketplaces, granaries, hospitals, mass transits) in 1874AD.
Two turns after that my 50-turn research of Computers completed and I began research toward The Cure For Cancer. 100% research would require 15 turns to learn Miniaturization! Fortunately I had a lot of specialists. Reassigning most of them to be scientists got me to four turn research, running at just a small net loss. I learned Miniaturization in 1886AD, Genetics in 1896AD, and completed Cure For Cancer in 1908AD. After learning Genetics only a couple of scientists did any further research.
For a while I used Civil Engineers to increase income. I had them build Courthouses and Banks in some cities, and even added Police Stations and Stock Exchanges to some. I was thinking it would be interesting to see how high I could push per turn income in a Monarchy. It became tedious and there wasn't much reason to do it, so I didn't finish that exercise. A net income over 10,000gpt is probably possible.
Dianthus' CRpMapStat utility was a great help in the milking phase. His latest additions (a display of coming culural expansions, another of pollution, and a command to center the display on a specified city) are wonderful for milkers!
The agricultural trait resulted in having numerous cities which produced an odd amount of food. I couldn't "balance" most of these cities - they would grow and then starve for the remainder of the game. I built granaries in all such cities. With a granary they'd at least get a bit of value out of the 1 extra food - they'd be at a larger size 1/3 of the time due to the granary. Once again I wished that one of the AIs on my home continent had built the Pyramids!
The End?
Not quite

Next I'll go back to dig into a few questions I noted along the way. When I finish that I'll report my findings here.