Hope this helps, seems nearest.

Marriage Jun 1839 CLEAVE Ann & MORTIMORE William St Thomas 10 387
Death Mar 1842 MORTIMORE William St Thomas 10 198
Death Mar 1846 MORTIMORE Ann Newton Abbot 10 95

BIRTH Dec 1842 Mortimore Lucy Newton Abbot 10 137
1851 Census: Southernay House, Kingskerswell, Newton Abbot, Devon
George DAUNENT (Diamond?) Head M 68 M Ag Lab Lustleigh-Dev
Ann DAUNENT Wife M 69 F Kingskerswell-Dev
Elizth. BRAGG Daur W 44 F Kingskerswell-Dev
Susan BRAGG Daur U 20 F Widows Dau Kingskerswell-Dev
Lucey CLEAVE Vist U 8 F Scholar Kingskerswell-Dev

BIRTH Sep 1844 Mortimore Anna Maria Newton Abbot 10 160 (Lucy's half-sister?)
1851 Census: Kenn St Thomas, Devon
Samuel CLEAVE Head M 57 M Farmer 150A Emp 6Lab Haccombe-Dev
Ann CLEAVE Wife M 60 F Kenn-Dev
Maria CLEAVE Daur U 35 F Farmer Daur Kenn-Dev
Samuel CLEAVE Son U 31 M Farmer Son Kenn-Dev
Harriet CLEAVE Daur U 21 F Farmers Daur Kenn-Dev
Robert CLEAVE Son 19 M Blacksmith Kenn-Dev
Joseph CLEAVE Son 17 M Farmers Son Kenn-Dev
Anna MORTIMORE GDau 6 F Torquay-Dev (nr Kingskerswell)
John SMALE Serv U 27 M Farmers Servant Exeter-Dev
Peter SNOW Serv 13 M Farmers Servant Shillingford-Dev
Good luck.