With yesterday's bits dried this morning I've managed to make a bit more progress. Most of the walls are in place and two of the sets of steps down into the docks are completed.
I've added a couple of arches for underground streams. These will appear to join up with the waterways in the rest of the city.
The remaining wall bit dried a lot quicker than I expected so I got the last part of the wall completed.
Only problem now is that I wanted to build the wall up a bit higher, but I've run out of basic blocks!