Thames Barges I sailed as mate and later skipper on several sailing barges when they were still carrying cargo back in the 1950's. Also motor...
Yes, there are many photos of barges sailing with topsails set over a partly brailed mainsail, a lot of them are of barges racing. I've sailed...
The spritsail on a Thames barge is seldom actually reefed, sail is first reduced by dropping the topsail. The only way of reefing is by 'brailing...