Reed, I have just had a quick look at IGI and there are quite a few children of James Winstone & Elizabeth Vowles (born at Wraxall Somerset).
John 1825 William 1827 Mary 1831 James 1833 Charles 1835 Elizabeth 1837 Louisa 1839
Also it appears that Elizabeth born 1837 married a cousin John Vowles 24 May 1865 at Wraxall. They also appear in 1881 census. Have a browse thro LDS site as I found that info in 5 minutes (of course you need to confirm it - altho the parents are correct).