I have found one, but there may be others.
James Stevens, son of James and Lucinda Stevens,born 30 April baptised 25 May 1815, St Thomas, Salisbury.
This family included the following children:
Mary Jane (1803), Harriet Lucinda (1805), John (1806), Ann Elizabeth (1809), Maria (1811), James Jervoise (1813) - I suspect the last one died before James was born in 1815.
I can't see any sign of a marriage.
I would still look for others, but if these names come up later in the family, it is possible this is your James.
Nell