Help with Marriage of William Rundle

[turnera]

I was wondering if any1 can help me find the marriage of William Henry Rundle (plasterer- born in Plymouth q4 1849 and died q4 1925) whom married Selina . From the census in 1891 they appear to have : Louisa, Annie , Walter and William as children! Although Louisa and Annie don't seem to appear any where before or after the 1891 census and I cant find their births! On Walter's birth cert -Selina is shown as having Tamlin as a maiden name. I believe she was born in Fowey , Cornwall from census records,  and due to her age of 72 on death would mean she would have been born around 1926. However, I cannot find anything for Selina Tamlin marrying a William Rundle , nor indeed the birth of Selina Tamlin!

If any1 could help I would be most appreciative.

Thanks
Andrew