Finding a J M W Turner artwork

In Sept 2013, my wife and I spent a weekend in Stamford, Lincolnshire. We were following a self-guided tour of the town's Georgian history which stopped right outside the door to our lodgings, an old coaching inn on the High Street. Apparently, Turner himself had visited Stamford in the 1830s and had painted a watercolour of the stage coach arriving at this very inn. I was intrigued and spent the evening trying to find a picture of the artwork on the internet but with no luck. The next day we left for home in Cheshire via a very circuitous and almost random route. We spent the morning in Oakham. Then I decided I would like to drive north along Ermine Street, the old Roman road. Late afternoon and we were in the vicinity of Lincoln. My wife suggested we visit the cathedral. I drove directly into town using the cathedral as a visual target and as we got nearer, looking for a parking space, I made a number of turns, left, right, left, right and conveniently entered a largely empty car park just below the cathedral. The car park was next to the Usher Art Gallery. It was quiet so we popped in for a quick look round. I followed my wife up the stairs and at the top while she went straight on I turned down a short dimly lit corridor to the left. I went straight to the far end to work my way back but at the end and the first picture that met my eyes was Turner's watercolour 'Stamford'. I had forgotten all about my earlier search for the picture until that moment. It was a very personal, very spooky experience.