I have looked at the image and there is nothing else to be gained from it (except that William is an Ag Lab). It's all exactly as transcribed:
Sarah Birch Female 12 Staffordshire
Mary Birch Female 10 Staffordshire
John Birch Male 7 Staffordshire
Edward Smith Male 70 Staffordshire
William Birch Male 25
Rosehannah Birch Female 49
The 1841 census, as I'm sure you are aware, does not list relationships (like Husband and Wife). My guess is that Rosehannah is the Hannah you have already mentioned; a younger man married to an older woman! Pure theory: Edward Smith, age 70, is the father of Rosehannah (Smith) Birch; she is married to William. How about this record? (maybe she was originally a Smith, married to a Marshall first?)