A Swedish family, called Scheutz, finished the Difference Engine within a few years after Babbage gave up, and sold them very profitably for many decades. http

A Swedish family, called Scheutz, finished the Difference Engine within a few years after Babbage gave up, and sold them very profitably for many decades. https://en.wikipedia.org/wiki/Per_Georg_Scheutz https://en.wikipedia.org/wiki/Per_Georg_Scheutz It wasn't too hard for the time... Babbage just kept getting distracted.