I am myself descended from Henry Cheetham via his daughter Isabella. From my research he is indeed related to the Cheethams involved in the canal business between Liverpool and Leeds.
I have searched for his marriage and the date 5 September 1858 to Ann Dobson, although like you from the census' it states Hannah. There exists no other marriage between any Henry Cheetham and an individual named Hannah.
Foe further info on the Cheethams go to Pat and Don Hancocks website or contact Margaret Hegan via the Ormskirk FHS which I am sure you will find useful.
If you need any info please contact me via the noticeboard.