Just an afterthought on the Cantrills. You mention the Manchester connection, and perhaps the following is relevant?
The only likely marriage I came across for Henry Cantrill's parents took place between Henry Cantrill and Mary Rainey in Manchester Dec 16 1805, which was not long before his birth in 1807 - albeit in Derby. However, I then found that that couple had several children born in Manchester (I don't have the names or dates here), which rather put me off the scent. However, I suppose it is conceivable that they were living in Derby at the time of Henry's birth, but then moved back to Manchester?