HI
Have nothing concrete on Elizabeth, but the strange thing is this in the 1851 census (as it was the nearest census to the marriage of you two people)
I found these two people note their occupation
Living respectivley at 44 & 45 Stott Hill, Bradford
Ephraim Smith bn abt 1826 Bradford Occ- Sexton of Parish Church employing one man
Mary Smith wife of above bn as above
Mary Smith Mother of Ephraim Widow age about 55
Elizabeth Smith Sister of Ephraim age about 28
And right next door to him
William Holmes age about 35 bn Howarth Occ Parish Clerk
Ellen his wife age about 34 in Bradford
James son of above 10 born Wilsden
Uncanny or what I bet these two were the witnesses more so in an official capacity.
Just to add in the 1841 census Ephraims father Joseph was also Parish Sexton....
Wendy