and a nearer match to ours:~
William Lucas b. Leeds married to Sarah however in 1851 he is much younger showing as only 21
i have found this one quite easily through the census
is this two different William & Sarahs ? maybe the 1861 doesnt fit? and more than likely he is ours and the other not

1851 HO107; 2320; 881; 15
William 21 (.... .... overlooker ) wife Sarah 19 dau. Mary 2 months
1861 RG9; 3366; 56; 21
William 36 (Bricklayer)wife Sarah 29 and children Sarah 6 & William 4
1871 RG10; 4557; 81; 19
William 41 (labourer in boot works) wife Sarah 38 children William 10, Eliza A 16, Emma 14, Mary A 13, Sarah 5, Charlotte 3
1881 RG11; 4467;87; 1;
William 51 (wool combing overlooker) wife Sarah 48, children William Jnr 20, Emma 24, Sarah Jnr 15, Peter 6
1891 RG12; 3636; 72; 1;
William 61 (Boot making worker) wife Sarah 58 son Peter 16 , Mary Ann Holts dau. 32 Edith Holts grandau. 11