William Turnbull's Siblings

[terianne]

Current looking at my Turnbull side, but have kind of hit a brick wall - I'm trying to find out about my GrGr Grandfather brothers and sisters, but they were Non-conformist at West Port/St George Churchs.  William was married to Jane Dryden, his parents were James Turnbull & Margaret Ainslie, his son James wrote Hawick in Begone Days (my Gr Grandfather).  I have managed to find three brothers, Walter, James and George, but I thinks there is more siblings. - but drawning a blank

Also not exactly sure about William date of birth, because he died during the Cholrea outbreak around Sept 1849 before the records were offically kept, he in the chorlea pit in the Wellogate - saw the Lair book years ago and his name was there.