Searching the IGI at the mormon site gives just three William Sinclair
born in England in 1835. None of them has a B-name. However this
William's mothers surname was Brown and maybe his full name was William
Brown Sinclair..... but as you gave no dates I don't know if he fits
your William B S.
William SINCLAIR
Sex: M
Event(s):
Birth: 29 Mar 1835 Rockcliffe, Cumberland, England
Parents:
Father: George SINCLAIR
Mother: Jane BROWN
Regards
Lena
[ This is the Sinclair family discussion list, sinclair@mids.org
[ To get off or on the list, see http://www.mids.org/sinclair/list.html