The Cooper/Lane Marriage was 25 Jul 1799 so after Sarah Cooper/Smith/Walker was born according to Census.
To confuse more Samuel Massey, Nephew on 1851 Census seems to have married a Elizabeth COOPER   
13 Dec 1828 Duffield, Over 21 occp Farmer
1861 Elizabeth Massey is born c 1803 Windley 
Sorry leaving this for now as my heads spinning 
