No ****oo clock?
Once you fix your happiness issues (you forgot about hooking up your pearls, which would help)...
Yes, I think that was an oversight. At turn 64 you're opening up the tech screen and are pondering between Archery and Construction. Sailing should have been a consideration. Buying the workboat, I suppose, as Mumbai was already busy with a library.
Mumbai was earlier working on a worker, by the way. It could be worthwhile to try and preserve those invested hammers. Hammers invested in a unit stay intact for 10 turns, then they slowly get lost. But they are preserved if once in ten turns you put some hammers in it again. It looked like Mumbai was already halfway the worker, so that might still be worth doing if you haven't played any further then what this video is showing. You'll need another worker at some stage anyway.
For buildings the hammers stay intact for 50 turns, so for buildings it's even easier to preserve the hammers.
I found it hard to bear seeing that worker in Delhi spent so long in hiding, while it could have been hacking away on some stones! The barb camp was behind forest, there was no risk for the worker.
Brussels has an interesting strategic position, there at the crossroads between you and both America and England. I normally avoid spending money on hostile City States, but here I would probably at least try to keep some money at hand to buy them on my side for when situations start to heat up. Especially when you're weaker, having a CS ally between you and your enemy can be great. Of course if you're stronger you don't need to care.
I think you can sell some of your iron. I know you will want to build up for war, but if your plan is to first build the National College in Delhi you won't be building military for a while anyway. Building the NC + some archers and warriors for upgrade will easily take you the time of the trade deal, and other towns are still to small to build much military.
And if you sell them to Washington and he declares - which is something you need to be counting on - his swords will suffer a 50% strength penalty if they're built from your iron, so that's not a reason not to sell iron to him.
I have a request, if I may: Could you post the 4000BC save of this game, assuming you still have it? It looks like a great start for putting in mostly coastal towns, I'd like to try it that way, just playing my own game.
Maybe other lurkers will appreciate the 4000BC save as well.
Thanks for posting this, I'll keep following!