Weehee!!
Been pomdering this one all day - and now JAP has elicited more clues....
Lass, Benjamin Franklin BALHAREY may just be your big clue....it's a very odd name for a Scottish child....smacks of being born overseas, or having a strong connection to overseas.....
I was also wondering - as you say David's sister was younger than him, and if he was indeed born abt 1834 and was in Chile by abt 1850 when aged very young (abt 15?) - even in those days it's very young for a lad to be travelling alone with a sister even younger than himself, unless perhaps there was a) family in the destination country to whom they were going or b) they travelled with at least 1 parent or older family member?? Just my thoughts on that....
Now, the death registration has this Benjamin as age 21 when he died 1871 in Angus.
Can you please tell us:
the address where his death occured or where his usual residence was?
who was the informant?
what was his father's occupation?
Look at this:
1861: 25 Prior Road, Forfar, AngusHead: John BEAUMONT 31, Teacher of Languages?, b Gerrans, Ayrshire
Wife: Jessie BEAUMONT 28, b Maylole, Ayrshire
Son: William l BEAUMONT 7, b Glasgow, Lanarkshire
Son: John F BEAUMONT 6, b Forfar
Son: Robert BEAUMONT 6, b Forfar
Son: Frederick A BEAUMONT 4, b Forfar
Dau: Jessie BEAUMONT 3, b Forfar
Dau: Margaret BEAUMONT under 6 mths, b Forfar
Boarder: Jackina? BLAIR 17 (female) Scholar, b Kirkmichael, Ayrshire
Boarder: Benjamin F BATHANEY 12, Scholar, b ChileServant: Jane THOMPSON 17, Domestic Servant, b Forfar
Servant: Jessie EDWARDS, 16, Nursery Maid, b Kirriemuir, Forfarshire
You would need to consult the original image on SP to see if this Benjamin is a BALHAREY (var) - and considering the number of mis-transcripts of the BALHARRY/IE names of the transcribed source, it's very possible!
Cheers
AMBLY